Finding the Fourth Proportional to 1,298.01, 1,789.72 and 1,048.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,298.01 : 1,789.72 = 1,048.55 : x
2. Step 2: Convert to fraction form
   1,298.01/1,789.72 = 1,048.55/x
3. Step 3: Cross multiply
   1,298.01x = 1,789.72 × 1,048.55
4. Step 4: Simplify right side
   1,298.01x = 1,876,617.39
5. Step 5: Solve for x
   x = 1,876,617.39/1,298.01
6. Step 6: Final answer
   x = 1,445.77