Finding the Fourth Proportional to 156,947.38, 235,494.06 and 72,660.40

Step by Step Solution

1. Step 1: Write the proportion equation
   156,947.38 : 235,494.06 = 72,660.40 : x
2. Step 2: Convert to fraction form
   156,947.38/235,494.06 = 72,660.40/x
3. Step 3: Cross multiply
   156,947.38x = 235,494.06 × 72,660.40
4. Step 4: Simplify right side
   156,947.38x = 17,111,092,597.22
5. Step 5: Solve for x
   x = 17,111,092,597.22/156,947.38
6. Step 6: Final answer
   x = 109,024.39