Finding the Fourth Proportional to 287,841.84, 431,759.72 and 98,300.04

Step by Step Solution

1. Step 1: Write the proportion equation
   287,841.84 : 431,759.72 = 98,300.04 : x
2. Step 2: Convert to fraction form
   287,841.84/431,759.72 = 98,300.04/x
3. Step 3: Cross multiply
   287,841.84x = 431,759.72 × 98,300.04
4. Step 4: Simplify right side
   287,841.84x = 42,441,997,254.89
5. Step 5: Solve for x
   x = 42,441,997,254.89/287,841.84
6. Step 6: Final answer
   x = 147,449.02