Finding the Fourth Proportional to 2,308.10, 3,461.29 and 921.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,308.10 : 3,461.29 = 921.02 : x
2. Step 2: Convert to fraction form
   2,308.10/3,461.29 = 921.02/x
3. Step 3: Cross multiply
   2,308.10x = 3,461.29 × 921.02
4. Step 4: Simplify right side
   2,308.10x = 3,187,897.71
5. Step 5: Solve for x
   x = 3,187,897.71/2,308.10
6. Step 6: Final answer
   x = 1,381.18