Finding the Fourth Proportional to 130,142.06, 179,594.77 and 72,780.72

Step by Step Solution

1. Step 1: Write the proportion equation
   130,142.06 : 179,594.77 = 72,780.72 : x
2. Step 2: Convert to fraction form
   130,142.06/179,594.77 = 72,780.72/x
3. Step 3: Cross multiply
   130,142.06x = 179,594.77 × 72,780.72
4. Step 4: Simplify right side
   130,142.06x = 13,071,036,304.93
5. Step 5: Solve for x
   x = 13,071,036,304.93/130,142.06
6. Step 6: Final answer
   x = 100,436.68