Finding the Fourth Proportional to 2,101.59, 2,900.66 and 1,393.47

Step by Step Solution

1. Step 1: Write the proportion equation
   2,101.59 : 2,900.66 = 1,393.47 : x
2. Step 2: Convert to fraction form
   2,101.59/2,900.66 = 1,393.47/x
3. Step 3: Cross multiply
   2,101.59x = 2,900.66 × 1,393.47
4. Step 4: Simplify right side
   2,101.59x = 4,041,982.69
5. Step 5: Solve for x
   x = 4,041,982.69/2,101.59
6. Step 6: Final answer
   x = 1,923.30