Finding the Fourth Proportional to 1,578,821, 2,178,824.82 and 863,429

Step by Step Solution

1. Step 1: Write the proportion equation
   1,578,821 : 2,178,824.82 = 863,429 : x
2. Step 2: Convert to fraction form
   1,578,821/2,178,824.82 = 863,429/x
3. Step 3: Cross multiply
   1,578,821x = 2,178,824.82 × 863,429
4. Step 4: Simplify right side
   1,578,821x = 1,881,260,535,507.78
5. Step 5: Solve for x
   x = 1,881,260,535,507.78/1,578,821
6. Step 6: Final answer
   x = 1,191,560.37