Finding the Fourth Proportional to 156,496.16, 215,961.72 and 84,874.88

Step by Step Solution

1. Step 1: Write the proportion equation
   156,496.16 : 215,961.72 = 84,874.88 : x
2. Step 2: Convert to fraction form
   156,496.16/215,961.72 = 84,874.88/x
3. Step 3: Cross multiply
   156,496.16x = 215,961.72 × 84,874.88
4. Step 4: Simplify right side
   156,496.16x = 18,329,725,069.59
5. Step 5: Solve for x
   x = 18,329,725,069.59/156,496.16
6. Step 6: Final answer
   x = 117,125.72