Finding the Fourth Proportional to 169,780.48, 254,320.72 and 99,446.56

Step by Step Solution

1. Step 1: Write the proportion equation
   169,780.48 : 254,320.72 = 99,446.56 : x
2. Step 2: Convert to fraction form
   169,780.48/254,320.72 = 99,446.56/x
3. Step 3: Cross multiply
   169,780.48x = 254,320.72 × 99,446.56
4. Step 4: Simplify right side
   169,780.48x = 25,291,320,740.72
5. Step 5: Solve for x
   x = 25,291,320,740.72/169,780.48
6. Step 6: Final answer
   x = 148,964.83