Finding the Fourth Proportional to 1,290.60, 1,934.52 and 560.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,290.60 : 1,934.52 = 560.52 : x
2. Step 2: Convert to fraction form
   1,290.60/1,934.52 = 560.52/x
3. Step 3: Cross multiply
   1,290.60x = 1,934.52 × 560.52
4. Step 4: Simplify right side
   1,290.60x = 1,084,337.15
5. Step 5: Solve for x
   x = 1,084,337.15/1,290.60
6. Step 6: Final answer
   x = 840.18