Finding the Fourth Proportional to 115,861.83, 159,852.15 and 64,867.05

Step by Step Solution

1. Step 1: Write the proportion equation
   115,861.83 : 159,852.15 = 64,867.05 : x
2. Step 2: Convert to fraction form
   115,861.83/159,852.15 = 64,867.05/x
3. Step 3: Cross multiply
   115,861.83x = 159,852.15 × 64,867.05
4. Step 4: Simplify right side
   115,861.83x = 10,369,137,406.66
5. Step 5: Solve for x
   x = 10,369,137,406.66/115,861.83
6. Step 6: Final answer
   x = 89,495.72