Finding the Fourth Proportional to 152,755, 210,802.62 and 85,687

Step by Step Solution

1. Step 1: Write the proportion equation
   152,755 : 210,802.62 = 85,687 : x
2. Step 2: Convert to fraction form
   152,755/210,802.62 = 85,687/x
3. Step 3: Cross multiply
   152,755x = 210,802.62 × 85,687
4. Step 4: Simplify right side
   152,755x = 18,063,044,099.94
5. Step 5: Solve for x
   x = 18,063,044,099.94/152,755
6. Step 6: Final answer
   x = 118,248.46