Finding the Fourth Proportional to 1,527.61, 2,108.15 and 864.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.61 : 2,108.15 = 864.45 : x
2. Step 2: Convert to fraction form
   1,527.61/2,108.15 = 864.45/x
3. Step 3: Cross multiply
   1,527.61x = 2,108.15 × 864.45
4. Step 4: Simplify right side
   1,527.61x = 1,822,390.27
5. Step 5: Solve for x
   x = 1,822,390.27/1,527.61
6. Step 6: Final answer
   x = 1,192.97