Finding the Fourth Proportional to 78,569.28, 108,411.27 and 51,338.17

Step by Step Solution

1. Step 1: Write the proportion equation
   78,569.28 : 108,411.27 = 51,338.17 : x
2. Step 2: Convert to fraction form
   78,569.28/108,411.27 = 51,338.17/x
3. Step 3: Cross multiply
   78,569.28x = 108,411.27 × 51,338.17
4. Step 4: Simplify right side
   78,569.28x = 5,565,636,209.18
5. Step 5: Solve for x
   x = 5,565,636,209.18/78,569.28
6. Step 6: Final answer
   x = 70,837.31