Finding the Fourth Proportional to 156,410.88, 215,846.52 and 84,790.90

Step by Step Solution

1. Step 1: Write the proportion equation
   156,410.88 : 215,846.52 = 84,790.90 : x
2. Step 2: Convert to fraction form
   156,410.88/215,846.52 = 84,790.90/x
3. Step 3: Cross multiply
   156,410.88x = 215,846.52 × 84,790.90
4. Step 4: Simplify right side
   156,410.88x = 18,301,820,584.89
5. Step 5: Solve for x
   x = 18,301,820,584.89/156,410.88
6. Step 6: Final answer
   x = 117,011.17