Finding the Fourth Proportional to 128,714.76, 192,668.22 and 88,499.07

Step by Step Solution

1. Step 1: Write the proportion equation
   128,714.76 : 192,668.22 = 88,499.07 : x
2. Step 2: Convert to fraction form
   128,714.76/192,668.22 = 88,499.07/x
3. Step 3: Cross multiply
   128,714.76x = 192,668.22 × 88,499.07
4. Step 4: Simplify right side
   128,714.76x = 17,050,958,288.56
5. Step 5: Solve for x
   x = 17,050,958,288.56/128,714.76
6. Step 6: Final answer
   x = 132,470.89