Finding the Fourth Proportional to 57,705.29, 86,330.18 and 43,705.65

Step by Step Solution

1. Step 1: Write the proportion equation
   57,705.29 : 86,330.18 = 43,705.65 : x
2. Step 2: Convert to fraction form
   57,705.29/86,330.18 = 43,705.65/x
3. Step 3: Cross multiply
   57,705.29x = 86,330.18 × 43,705.65
4. Step 4: Simplify right side
   57,705.29x = 3,773,116,740.78
5. Step 5: Solve for x
   x = 3,773,116,740.78/57,705.29
6. Step 6: Final answer
   x = 65,385.98