Finding the Fourth Proportional to 287,980.01, 431,968.18 and 98,348.88

Step by Step Solution

1. Step 1: Write the proportion equation
   287,980.01 : 431,968.18 = 98,348.88 : x
2. Step 2: Convert to fraction form
   287,980.01/431,968.18 = 98,348.88/x
3. Step 3: Cross multiply
   287,980.01x = 431,968.18 × 98,348.88
4. Step 4: Simplify right side
   287,980.01x = 42,483,586,698.64
5. Step 5: Solve for x
   x = 42,483,586,698.64/287,980.01
6. Step 6: Final answer
   x = 147,522.69