Finding the Fourth Proportional to 91,861.43, 126,782.62 and 56,072.18

Step by Step Solution

1. Step 1: Write the proportion equation
   91,861.43 : 126,782.62 = 56,072.18 : x
2. Step 2: Convert to fraction form
   91,861.43/126,782.62 = 56,072.18/x
3. Step 3: Cross multiply
   91,861.43x = 126,782.62 × 56,072.18
4. Step 4: Simplify right side
   91,861.43x = 7,108,978,066.29
5. Step 5: Solve for x
   x = 7,108,978,066.29/91,861.43
6. Step 6: Final answer
   x = 77,388.07