Finding the Fourth Proportional to 98,698.16, 148,061.88 and 28,568.72

Step by Step Solution

1. Step 1: Write the proportion equation
   98,698.16 : 148,061.88 = 28,568.72 : x
2. Step 2: Convert to fraction form
   98,698.16/148,061.88 = 28,568.72/x
3. Step 3: Cross multiply
   98,698.16x = 148,061.88 × 28,568.72
4. Step 4: Simplify right side
   98,698.16x = 4,229,938,392.39
5. Step 5: Solve for x
   x = 4,229,938,392.39/98,698.16
6. Step 6: Final answer
   x = 42,857.32