Finding the Fourth Proportional to 91,796.48, 126,443.12 and 64,892.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,796.48 : 126,443.12 = 64,892.72 : x
2. Step 2: Convert to fraction form
   91,796.48/126,443.12 = 64,892.72/x
3. Step 3: Cross multiply
   91,796.48x = 126,443.12 × 64,892.72
4. Step 4: Simplify right side
   91,796.48x = 8,205,237,982.09
5. Step 5: Solve for x
   x = 8,205,237,982.09/91,796.48
6. Step 6: Final answer
   x = 89,385.10