Finding the Fourth Proportional to 1,426.16, 2,127.61 and 1,389.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.16 : 2,127.61 = 1,389.98 : x
2. Step 2: Convert to fraction form
   1,426.16/2,127.61 = 1,389.98/x
3. Step 3: Cross multiply
   1,426.16x = 2,127.61 × 1,389.98
4. Step 4: Simplify right side
   1,426.16x = 2,957,335.35
5. Step 5: Solve for x
   x = 2,957,335.35/1,426.16
6. Step 6: Final answer
   x = 2,073.64