Finding the Fourth Proportional to 152,185.50, 210,016.71 and 85,117.50

Step by Step Solution

1. Step 1: Write the proportion equation
   152,185.50 : 210,016.71 = 85,117.50 : x
2. Step 2: Convert to fraction form
   152,185.50/210,016.71 = 85,117.50/x
3. Step 3: Cross multiply
   152,185.50x = 210,016.71 × 85,117.50
4. Step 4: Simplify right side
   152,185.50x = 17,876,097,313.43
5. Step 5: Solve for x
   x = 17,876,097,313.43/152,185.50
6. Step 6: Final answer
   x = 117,462.55