Finding the Fourth Proportional to 1,553.31, 2,143.80 and 1,150.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,553.31 : 2,143.80 = 1,150.47 : x
2. Step 2: Convert to fraction form
   1,553.31/2,143.80 = 1,150.47/x
3. Step 3: Cross multiply
   1,553.31x = 2,143.80 × 1,150.47
4. Step 4: Simplify right side
   1,553.31x = 2,466,377.59
5. Step 5: Solve for x
   x = 2,466,377.59/1,553.31
6. Step 6: Final answer
   x = 1,587.82