Finding the Fourth Proportional to 3,100.76, 4,651.43 and 1,020.78

Step by Step Solution

1. Step 1: Write the proportion equation
   3,100.76 : 4,651.43 = 1,020.78 : x
2. Step 2: Convert to fraction form
   3,100.76/4,651.43 = 1,020.78/x
3. Step 3: Cross multiply
   3,100.76x = 4,651.43 × 1,020.78
4. Step 4: Simplify right side
   3,100.76x = 4,748,081.61
5. Step 5: Solve for x
   x = 4,748,081.61/3,100.76
6. Step 6: Final answer
   x = 1,531.27