Finding the Fourth Proportional to 1,561.61, 2,152.06 and 1,118.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.61 : 2,152.06 = 1,118.75 : x
2. Step 2: Convert to fraction form
   1,561.61/2,152.06 = 1,118.75/x
3. Step 3: Cross multiply
   1,561.61x = 2,152.06 × 1,118.75
4. Step 4: Simplify right side
   1,561.61x = 2,407,603.57
5. Step 5: Solve for x
   x = 2,407,603.57/1,561.61
6. Step 6: Final answer
   x = 1,541.74