Finding the Fourth Proportional to 3,761.30, 5,642.20 and 987.97

Step by Step Solution

1. Step 1: Write the proportion equation
   3,761.30 : 5,642.20 = 987.97 : x
2. Step 2: Convert to fraction form
   3,761.30/5,642.20 = 987.97/x
3. Step 3: Cross multiply
   3,761.30x = 5,642.20 × 987.97
4. Step 4: Simplify right side
   3,761.30x = 5,574,298.59
5. Step 5: Solve for x
   x = 5,574,298.59/3,761.30
6. Step 6: Final answer
   x = 1,482.01