Finding the Fourth Proportional to 130,188.32, 179,651.42 and 72,817.72

Step by Step Solution

1. Step 1: Write the proportion equation
   130,188.32 : 179,651.42 = 72,817.72 : x
2. Step 2: Convert to fraction form
   130,188.32/179,651.42 = 72,817.72/x
3. Step 3: Cross multiply
   130,188.32x = 179,651.42 × 72,817.72
4. Step 4: Simplify right side
   130,188.32x = 13,081,806,799.16
5. Step 5: Solve for x
   x = 13,081,806,799.16/130,188.32
6. Step 6: Final answer
   x = 100,483.72