Finding the Fourth Proportional to 79,153.30, 109,248.06 and 72,769.78

Step by Step Solution

1. Step 1: Write the proportion equation
   79,153.30 : 109,248.06 = 72,769.78 : x
2. Step 2: Convert to fraction form
   79,153.30/109,248.06 = 72,769.78/x
3. Step 3: Cross multiply
   79,153.30x = 109,248.06 × 72,769.78
4. Step 4: Simplify right side
   79,153.30x = 7,949,957,291.63
5. Step 5: Solve for x
   x = 7,949,957,291.63/79,153.30
6. Step 6: Final answer
   x = 100,437.47