Finding the Fourth Proportional to 156,870.57, 216,482.76 and 85,250.59

Step by Step Solution

1. Step 1: Write the proportion equation
   156,870.57 : 216,482.76 = 85,250.59 : x
2. Step 2: Convert to fraction form
   156,870.57/216,482.76 = 85,250.59/x
3. Step 3: Cross multiply
   156,870.57x = 216,482.76 × 85,250.59
4. Step 4: Simplify right side
   156,870.57x = 18,455,282,473.62
5. Step 5: Solve for x
   x = 18,455,282,473.62/156,870.57
6. Step 6: Final answer
   x = 117,646.55