Finding the Fourth Proportional to 1,569.58, 2,165.91 and 906.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,569.58 : 2,165.91 = 906.31 : x
2. Step 2: Convert to fraction form
   1,569.58/2,165.91 = 906.31/x
3. Step 3: Cross multiply
   1,569.58x = 2,165.91 × 906.31
4. Step 4: Simplify right side
   1,569.58x = 1,962,985.89
5. Step 5: Solve for x
   x = 1,962,985.89/1,569.58
6. Step 6: Final answer
   x = 1,250.64