Finding the Fourth Proportional to 1,327,742,111.69, 1,991,585,818.18 and 442,491,758.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,327,742,111.69 : 1,991,585,818.18 = 442,491,758.68 : x
2. Step 2: Convert to fraction form
   1,327,742,111.69/1,991,585,818.18 = 442,491,758.68/x
3. Step 3: Cross multiply
   1,327,742,111.69x = 1,991,585,818.18 × 442,491,758.68
4. Step 4: Simplify right side
   1,327,742,111.69x = 881,260,311,248,614,912
5. Step 5: Solve for x
   x = 881,260,311,248,614,912/1,327,742,111.69
6. Step 6: Final answer
   x = 663,728,523.40