Finding the Fourth Proportional to 156,404.60, 215,839.46 and 84,785.75

Step by Step Solution

1. Step 1: Write the proportion equation
   156,404.60 : 215,839.46 = 84,785.75 : x
2. Step 2: Convert to fraction form
   156,404.60/215,839.46 = 84,785.75/x
3. Step 3: Cross multiply
   156,404.60x = 215,839.46 × 84,785.75
4. Step 4: Simplify right side
   156,404.60x = 18,300,110,071.77
5. Step 5: Solve for x
   x = 18,300,110,071.77/156,404.60
6. Step 6: Final answer
   x = 117,004.94