Finding the Fourth Proportional to 152,665, 210,677.70 and 85,597

Step by Step Solution

1. Step 1: Write the proportion equation
   152,665 : 210,677.70 = 85,597 : x
2. Step 2: Convert to fraction form
   152,665/210,677.70 = 85,597/x
3. Step 3: Cross multiply
   152,665x = 210,677.70 × 85,597
4. Step 4: Simplify right side
   152,665x = 18,033,379,086.90
5. Step 5: Solve for x
   x = 18,033,379,086.90/152,665
6. Step 6: Final answer
   x = 118,123.86