Finding the Fourth Proportional to 157,106.32, 235,474.89 and 72,688.12

Step by Step Solution

1. Step 1: Write the proportion equation
   157,106.32 : 235,474.89 = 72,688.12 : x
2. Step 2: Convert to fraction form
   157,106.32/235,474.89 = 72,688.12/x
3. Step 3: Cross multiply
   157,106.32x = 235,474.89 × 72,688.12
4. Step 4: Simplify right side
   157,106.32x = 17,116,227,061.31
5. Step 5: Solve for x
   x = 17,116,227,061.31/157,106.32
6. Step 6: Final answer
   x = 108,946.78