Finding the Fourth Proportional to 1,100.02, 1,648.23 and 987.10

Step by Step Solution

1. Step 1: Write the proportion equation
   1,100.02 : 1,648.23 = 987.10 : x
2. Step 2: Convert to fraction form
   1,100.02/1,648.23 = 987.10/x
3. Step 3: Cross multiply
   1,100.02x = 1,648.23 × 987.10
4. Step 4: Simplify right side
   1,100.02x = 1,626,967.83
5. Step 5: Solve for x
   x = 1,626,967.83/1,100.02
6. Step 6: Final answer
   x = 1,479.03