Finding the Fourth Proportional to 1,527.72, 2,108.16 and 906.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,527.72 : 2,108.16 = 906.72 : x
2. Step 2: Convert to fraction form
   1,527.72/2,108.16 = 906.72/x
3. Step 3: Cross multiply
   1,527.72x = 2,108.16 × 906.72
4. Step 4: Simplify right side
   1,527.72x = 1,911,510.84
5. Step 5: Solve for x
   x = 1,911,510.84/1,527.72
6. Step 6: Final answer
   x = 1,251.22