Finding the Fourth Proportional to 1,561.30, 2,152.42 and 1,088.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,561.30 : 2,152.42 = 1,088.51 : x
2. Step 2: Convert to fraction form
   1,561.30/2,152.42 = 1,088.51/x
3. Step 3: Cross multiply
   1,561.30x = 2,152.42 × 1,088.51
4. Step 4: Simplify right side
   1,561.30x = 2,342,917.21
5. Step 5: Solve for x
   x = 2,342,917.21/1,561.30
6. Step 6: Final answer
   x = 1,500.62