Finding the Fourth Proportional to 1,555.61, 2,342.52 and 1,147.57

Step by Step Solution

1. Step 1: Write the proportion equation
   1,555.61 : 2,342.52 = 1,147.57 : x
2. Step 2: Convert to fraction form
   1,555.61/2,342.52 = 1,147.57/x
3. Step 3: Cross multiply
   1,555.61x = 2,342.52 × 1,147.57
4. Step 4: Simplify right side
   1,555.61x = 2,688,199.82
5. Step 5: Solve for x
   x = 2,688,199.82/1,555.61
6. Step 6: Final answer
   x = 1,728.07