Finding the Fourth Proportional to 112,929.72, 169,139.70 and 64,836.60

Step by Step Solution

1. Step 1: Write the proportion equation
   112,929.72 : 169,139.70 = 64,836.60 : x
2. Step 2: Convert to fraction form
   112,929.72/169,139.70 = 64,836.60/x
3. Step 3: Cross multiply
   112,929.72x = 169,139.70 × 64,836.60
4. Step 4: Simplify right side
   112,929.72x = 10,966,443,073.02
5. Step 5: Solve for x
   x = 10,966,443,073.02/112,929.72
6. Step 6: Final answer
   x = 97,108.57