Finding the Fourth Proportional to 1,569.48, 2,165.73 and 906.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,569.48 : 2,165.73 = 906.55 : x
2. Step 2: Convert to fraction form
   1,569.48/2,165.73 = 906.55/x
3. Step 3: Cross multiply
   1,569.48x = 2,165.73 × 906.55
4. Step 4: Simplify right side
   1,569.48x = 1,963,333.72
5. Step 5: Solve for x
   x = 1,963,333.72/1,569.48
6. Step 6: Final answer
   x = 1,250.94