Finding the Fourth Proportional to 91,742.10, 126,605.37 and 55,438.56

Step by Step Solution

1. Step 1: Write the proportion equation
   91,742.10 : 126,605.37 = 55,438.56 : x
2. Step 2: Convert to fraction form
   91,742.10/126,605.37 = 55,438.56/x
3. Step 3: Cross multiply
   91,742.10x = 126,605.37 × 55,438.56
4. Step 4: Simplify right side
   91,742.10x = 7,018,819,401.07
5. Step 5: Solve for x
   x = 7,018,819,401.07/91,742.10
6. Step 6: Final answer
   x = 76,505.98