Finding the Fourth Proportional to 152,443.50, 210,372.03 and 85,375.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,443.50 : 210,372.03 = 85,375.50 : x
2. Step 2: Convert to fraction form
   152,443.50/210,372.03 = 85,375.50/x
3. Step 3: Cross multiply
   152,443.50x = 210,372.03 × 85,375.50
4. Step 4: Simplify right side
   152,443.50x = 17,960,617,247.27
5. Step 5: Solve for x
   x = 17,960,617,247.27/152,443.50
6. Step 6: Final answer
   x = 117,818.19