Finding the Fourth Proportional to 91,401.30, 126,188.28 and 57,438.54

Step by Step Solution

1. Step 1: Write the proportion equation
   91,401.30 : 126,188.28 = 57,438.54 : x
2. Step 2: Convert to fraction form
   91,401.30/126,188.28 = 57,438.54/x
3. Step 3: Cross multiply
   91,401.30x = 126,188.28 × 57,438.54
4. Step 4: Simplify right side
   91,401.30x = 7,248,070,568.31
5. Step 5: Solve for x
   x = 7,248,070,568.31/91,401.30
6. Step 6: Final answer
   x = 79,299.43