Finding the Fourth Proportional to 115,191.12, 158,978.88 and 64,899.84

Step by Step Solution

1. Step 1: Write the proportion equation
   115,191.12 : 158,978.88 = 64,899.84 : x
2. Step 2: Convert to fraction form
   115,191.12/158,978.88 = 64,899.84/x
3. Step 3: Cross multiply
   115,191.12x = 158,978.88 × 64,899.84
4. Step 4: Simplify right side
   115,191.12x = 10,317,703,875.38
5. Step 5: Solve for x
   x = 10,317,703,875.38/115,191.12
6. Step 6: Final answer
   x = 89,570.31