Finding the Fourth Proportional to 2,521.01, 3,781.57 and 918.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,521.01 : 3,781.57 = 918.10 : x
2. Step 2: Convert to fraction form
   2,521.01/3,781.57 = 918.10/x
3. Step 3: Cross multiply
   2,521.01x = 3,781.57 × 918.10
4. Step 4: Simplify right side
   2,521.01x = 3,471,857.12
5. Step 5: Solve for x
   x = 3,471,857.12/2,521.01
6. Step 6: Final answer
   x = 1,377.17