Finding the Fourth Proportional to 152,073.10, 209,859.69 and 85,005.10

Step by Step Solution

1. Step 1: Write the proportion equation
   152,073.10 : 209,859.69 = 85,005.10 : x
2. Step 2: Convert to fraction form
   152,073.10/209,859.69 = 85,005.10/x
3. Step 3: Cross multiply
   152,073.10x = 209,859.69 × 85,005.10
4. Step 4: Simplify right side
   152,073.10x = 17,839,143,934.42
5. Step 5: Solve for x
   x = 17,839,143,934.42/152,073.10
6. Step 6: Final answer
   x = 117,306.37