Finding the Fourth Proportional to 115,817.59, 159,820.52 and 64,821.61

Step by Step Solution

1. Step 1: Write the proportion equation
   115,817.59 : 159,820.52 = 64,821.61 : x
2. Step 2: Convert to fraction form
   115,817.59/159,820.52 = 64,821.61/x
3. Step 3: Cross multiply
   115,817.59x = 159,820.52 × 64,821.61
4. Step 4: Simplify right side
   115,817.59x = 10,359,822,693.78
5. Step 5: Solve for x
   x = 10,359,822,693.78/115,817.59
6. Step 6: Final answer
   x = 89,449.48