Finding the Fourth Proportional to 287,842.22, 431,760.29 and 98,300.42

Step by Step Solution

1. Step 1: Write the proportion equation
   287,842.22 : 431,760.29 = 98,300.42 : x
2. Step 2: Convert to fraction form
   287,842.22/431,760.29 = 98,300.42/x
3. Step 3: Cross multiply
   287,842.22x = 431,760.29 × 98,300.42
4. Step 4: Simplify right side
   287,842.22x = 42,442,215,196.02
5. Step 5: Solve for x
   x = 42,442,215,196.02/287,842.22
6. Step 6: Final answer
   x = 147,449.59