Finding the Fourth Proportional to 891,833.69, 1,337,954.89 and 386,479.50

Step by Step Solution

1. Step 1: Write the proportion equation
   891,833.69 : 1,337,954.89 = 386,479.50 : x
2. Step 2: Convert to fraction form
   891,833.69/1,337,954.89 = 386,479.50/x
3. Step 3: Cross multiply
   891,833.69x = 1,337,954.89 × 386,479.50
4. Step 4: Simplify right side
   891,833.69x = 517,092,138,089.90
5. Step 5: Solve for x
   x = 517,092,138,089.90/891,833.69
6. Step 6: Final answer
   x = 579,807.81