Finding the Fourth Proportional to 91,798.48, 126,445.88 and 64,894.72

Step by Step Solution

1. Step 1: Write the proportion equation
   91,798.48 : 126,445.88 = 64,894.72 : x
2. Step 2: Convert to fraction form
   91,798.48/126,445.88 = 64,894.72/x
3. Step 3: Cross multiply
   91,798.48x = 126,445.88 × 64,894.72
4. Step 4: Simplify right side
   91,798.48x = 8,205,669,977.75
5. Step 5: Solve for x
   x = 8,205,669,977.75/91,798.48
6. Step 6: Final answer
   x = 89,387.86