Finding the Fourth Proportional to 1,398.74, 1,928.73 and 1,100.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.74 : 1,928.73 = 1,100.02 : x
2. Step 2: Convert to fraction form
   1,398.74/1,928.73 = 1,100.02/x
3. Step 3: Cross multiply
   1,398.74x = 1,928.73 × 1,100.02
4. Step 4: Simplify right side
   1,398.74x = 2,121,641.57
5. Step 5: Solve for x
   x = 2,121,641.57/1,398.74
6. Step 6: Final answer
   x = 1,516.82