Finding the Fourth Proportional to 109,638.86, 151,275.95 and 64,314.50

Step by Step Solution

1. Step 1: Write the proportion equation
   109,638.86 : 151,275.95 = 64,314.50 : x
2. Step 2: Convert to fraction form
   109,638.86/151,275.95 = 64,314.50/x
3. Step 3: Cross multiply
   109,638.86x = 151,275.95 × 64,314.50
4. Step 4: Simplify right side
   109,638.86x = 9,729,236,008.32
5. Step 5: Solve for x
   x = 9,729,236,008.32/109,638.86
6. Step 6: Final answer
   x = 88,738.94