Finding the Fourth Proportional to 156,264.72, 215,629.88 and 87,341.46

Step by Step Solution

1. Step 1: Write the proportion equation
   156,264.72 : 215,629.88 = 87,341.46 : x
2. Step 2: Convert to fraction form
   156,264.72/215,629.88 = 87,341.46/x
3. Step 3: Cross multiply
   156,264.72x = 215,629.88 × 87,341.46
4. Step 4: Simplify right side
   156,264.72x = 18,833,428,538.82
5. Step 5: Solve for x
   x = 18,833,428,538.82/156,264.72
6. Step 6: Final answer
   x = 120,522.59