Finding the Fourth Proportional to 1,557.30, 2,339.51 and 1,010.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,557.30 : 2,339.51 = 1,010.55 : x
2. Step 2: Convert to fraction form
   1,557.30/2,339.51 = 1,010.55/x
3. Step 3: Cross multiply
   1,557.30x = 2,339.51 × 1,010.55
4. Step 4: Simplify right side
   1,557.30x = 2,364,186.78
5. Step 5: Solve for x
   x = 2,364,186.78/1,557.30
6. Step 6: Final answer
   x = 1,518.13