Finding the Fourth Proportional to 130,141.74, 179,594.34 and 72,780.42

Step by Step Solution

1. Step 1: Write the proportion equation
   130,141.74 : 179,594.34 = 72,780.42 : x
2. Step 2: Convert to fraction form
   130,141.74/179,594.34 = 72,780.42/x
3. Step 3: Cross multiply
   130,141.74x = 179,594.34 × 72,780.42
4. Step 4: Simplify right side
   130,141.74x = 13,070,951,494.82
5. Step 5: Solve for x
   x = 13,070,951,494.82/130,141.74
6. Step 6: Final answer
   x = 100,436.27