Finding the Fourth Proportional to 152,766.38, 210,817.61 and 85,698.38

Step by Step Solution

1. Step 1: Write the proportion equation
   152,766.38 : 210,817.61 = 85,698.38 : x
2. Step 2: Convert to fraction form
   152,766.38/210,817.61 = 85,698.38/x
3. Step 3: Cross multiply
   152,766.38x = 210,817.61 × 85,698.38
4. Step 4: Simplify right side
   152,766.38x = 18,066,726,169.89
5. Step 5: Solve for x
   x = 18,066,726,169.89/152,766.38
6. Step 6: Final answer
   x = 118,263.76