Finding the Fourth Proportional to 1,339.61, 2,018.54 and 1,101.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,339.61 : 2,018.54 = 1,101.47 : x
2. Step 2: Convert to fraction form
   1,339.61/2,018.54 = 1,101.47/x
3. Step 3: Cross multiply
   1,339.61x = 2,018.54 × 1,101.47
4. Step 4: Simplify right side
   1,339.61x = 2,223,345.65
5. Step 5: Solve for x
   x = 2,223,345.65/1,339.61
6. Step 6: Final answer
   x = 1,659.70