Finding the Fourth Proportional to 91,871.36, 126,796.34 and 56,082.20

Step by Step Solution

1. Step 1: Write the proportion equation
   91,871.36 : 126,796.34 = 56,082.20 : x
2. Step 2: Convert to fraction form
   91,871.36/126,796.34 = 56,082.20/x
3. Step 3: Cross multiply
   91,871.36x = 126,796.34 × 56,082.20
4. Step 4: Simplify right side
   91,871.36x = 7,111,017,699.15
5. Step 5: Solve for x
   x = 7,111,017,699.15/91,871.36
6. Step 6: Final answer
   x = 77,401.90