Finding the Fourth Proportional to 1,136,443,386.52, 1,704,742,062.18 and 399,423,686.68

Step by Step Solution

1. Step 1: Write the proportion equation
   1,136,443,386.52 : 1,704,742,062.18 = 399,423,686.68 : x
2. Step 2: Convert to fraction form
   1,136,443,386.52/1,704,742,062.18 = 399,423,686.68/x
3. Step 3: Cross multiply
   1,136,443,386.52x = 1,704,742,062.18 × 399,423,686.68
4. Step 4: Simplify right side
   1,136,443,386.52x = 680,914,359,314,401,408
5. Step 5: Solve for x
   x = 680,914,359,314,401,408/1,136,443,386.52
6. Step 6: Final answer
   x = 599,162,586.88