Finding the Fourth Proportional to 115,705.25, 159,672.53 and 64,717.77

Step by Step Solution

1. Step 1: Write the proportion equation
   115,705.25 : 159,672.53 = 64,717.77 : x
2. Step 2: Convert to fraction form
   115,705.25/159,672.53 = 64,717.77/x
3. Step 3: Cross multiply
   115,705.25x = 159,672.53 × 64,717.77
4. Step 4: Simplify right side
   115,705.25x = 10,333,650,071.86
5. Step 5: Solve for x
   x = 10,333,650,071.86/115,705.25
6. Step 6: Final answer
   x = 89,310.12