Finding the Fourth Proportional to 90,454.54, 124,712.56 and 64,643.94

Step by Step Solution

1. Step 1: Write the proportion equation
   90,454.54 : 124,712.56 = 64,643.94 : x
2. Step 2: Convert to fraction form
   90,454.54/124,712.56 = 64,643.94/x
3. Step 3: Cross multiply
   90,454.54x = 124,712.56 × 64,643.94
4. Step 4: Simplify right side
   90,454.54x = 8,061,911,245.89
5. Step 5: Solve for x
   x = 8,061,911,245.89/90,454.54
6. Step 6: Final answer
   x = 89,126.66