Finding the Fourth Proportional to 1,540.72, 2,125.90 and 877.32

Step by Step Solution

1. Step 1: Write the proportion equation
   1,540.72 : 2,125.90 = 877.32 : x
2. Step 2: Convert to fraction form
   1,540.72/2,125.90 = 877.32/x
3. Step 3: Cross multiply
   1,540.72x = 2,125.90 × 877.32
4. Step 4: Simplify right side
   1,540.72x = 1,865,094.59
5. Step 5: Solve for x
   x = 1,865,094.59/1,540.72
6. Step 6: Final answer
   x = 1,210.53