Finding the Fourth Proportional to 155,972.10, 234,039.15 and 72,866.10

Step by Step Solution

1. Step 1: Write the proportion equation
   155,972.10 : 234,039.15 = 72,866.10 : x
2. Step 2: Convert to fraction form
   155,972.10/234,039.15 = 72,866.10/x
3. Step 3: Cross multiply
   155,972.10x = 234,039.15 × 72,866.10
4. Step 4: Simplify right side
   155,972.10x = 17,053,520,107.82
5. Step 5: Solve for x
   x = 17,053,520,107.82/155,972.10
6. Step 6: Final answer
   x = 109,336.99