Finding the Fourth Proportional to 288,660.42, 432,879.90 and 99,085.46

Step by Step Solution

1. Step 1: Write the proportion equation
   288,660.42 : 432,879.90 = 99,085.46 : x
2. Step 2: Convert to fraction form
   288,660.42/432,879.90 = 99,085.46/x
3. Step 3: Cross multiply
   288,660.42x = 432,879.90 × 99,085.46
4. Step 4: Simplify right side
   288,660.42x = 42,892,104,016.25
5. Step 5: Solve for x
   x = 42,892,104,016.25/288,660.42
6. Step 6: Final answer
   x = 148,590.18