Finding the Fourth Proportional to 1,426.15, 2,140.58 and 939.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.15 : 2,140.58 = 939.52 : x
2. Step 2: Convert to fraction form
   1,426.15/2,140.58 = 939.52/x
3. Step 3: Cross multiply
   1,426.15x = 2,140.58 × 939.52
4. Step 4: Simplify right side
   1,426.15x = 2,011,117.72
5. Step 5: Solve for x
   x = 2,011,117.72/1,426.15
6. Step 6: Final answer
   x = 1,410.17