Finding the Fourth Proportional to 108,960.32, 163,434.72 and 64,006.40

Step by Step Solution

1. Step 1: Write the proportion equation
   108,960.32 : 163,434.72 = 64,006.40 : x
2. Step 2: Convert to fraction form
   108,960.32/163,434.72 = 64,006.40/x
3. Step 3: Cross multiply
   108,960.32x = 163,434.72 × 64,006.40
4. Step 4: Simplify right side
   108,960.32x = 10,460,868,062.21
5. Step 5: Solve for x
   x = 10,460,868,062.21/108,960.32
6. Step 6: Final answer
   x = 96,006.22