Finding the Fourth Proportional to 1,347.52, 2,018.18 and 1,128.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.52 : 2,018.18 = 1,128.82 : x
2. Step 2: Convert to fraction form
   1,347.52/2,018.18 = 1,128.82/x
3. Step 3: Cross multiply
   1,347.52x = 2,018.18 × 1,128.82
4. Step 4: Simplify right side
   1,347.52x = 2,278,161.95
5. Step 5: Solve for x
   x = 2,278,161.95/1,347.52
6. Step 6: Final answer
   x = 1,690.63