Finding the Fourth Proportional to 90,472.19, 124,736.82 and 64,661.54

Step by Step Solution

1. Step 1: Write the proportion equation
   90,472.19 : 124,736.82 = 64,661.54 : x
2. Step 2: Convert to fraction form
   90,472.19/124,736.82 = 64,661.54/x
3. Step 3: Cross multiply
   90,472.19x = 124,736.82 × 64,661.54
4. Step 4: Simplify right side
   90,472.19x = 8,065,674,875.90
5. Step 5: Solve for x
   x = 8,065,674,875.90/90,472.19
6. Step 6: Final answer
   x = 89,150.87