Finding the Fourth Proportional to 107,168.64, 147,923.52 and 64,720

Step by Step Solution

1. Step 1: Write the proportion equation
   107,168.64 : 147,923.52 = 64,720 : x
2. Step 2: Convert to fraction form
   107,168.64/147,923.52 = 64,720/x
3. Step 3: Cross multiply
   107,168.64x = 147,923.52 × 64,720
4. Step 4: Simplify right side
   107,168.64x = 9,573,610,214.40
5. Step 5: Solve for x
   x = 9,573,610,214.40/107,168.64
6. Step 6: Final answer
   x = 89,332.20