Finding the Fourth Proportional to 156,208.47, 215,568.72 and 84,588.50

Step by Step Solution

1. Step 1: Write the proportion equation
   156,208.47 : 215,568.72 = 84,588.50 : x
2. Step 2: Convert to fraction form
   156,208.47/215,568.72 = 84,588.50/x
3. Step 3: Cross multiply
   156,208.47x = 215,568.72 × 84,588.50
4. Step 4: Simplify right side
   156,208.47x = 18,234,634,671.72
5. Step 5: Solve for x
   x = 18,234,634,671.72/156,208.47
6. Step 6: Final answer
   x = 116,732.69