Finding the Fourth Proportional to 152,605.50, 210,595.59 and 85,537.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,605.50 : 210,595.59 = 85,537.50 : x
2. Step 2: Convert to fraction form
   152,605.50/210,595.59 = 85,537.50/x
3. Step 3: Cross multiply
   152,605.50x = 210,595.59 × 85,537.50
4. Step 4: Simplify right side
   152,605.50x = 18,013,820,279.63
5. Step 5: Solve for x
   x = 18,013,820,279.63/152,605.50
6. Step 6: Final answer
   x = 118,041.75