Finding the Fourth Proportional to 1,130.37, 1,690.88 and 1,061.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,130.37 : 1,690.88 = 1,061.25 : x
2. Step 2: Convert to fraction form
   1,130.37/1,690.88 = 1,061.25/x
3. Step 3: Cross multiply
   1,130.37x = 1,690.88 × 1,061.25
4. Step 4: Simplify right side
   1,130.37x = 1,794,441.09
5. Step 5: Solve for x
   x = 1,794,441.09/1,130.37
6. Step 6: Final answer
   x = 1,587.48