Finding the Fourth Proportional to 1,426.47, 2,136.56 and 876.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,426.47 : 2,136.56 = 876.98 : x
2. Step 2: Convert to fraction form
   1,426.47/2,136.56 = 876.98/x
3. Step 3: Cross multiply
   1,426.47x = 2,136.56 × 876.98
4. Step 4: Simplify right side
   1,426.47x = 1,873,720.39
5. Step 5: Solve for x
   x = 1,873,720.39/1,426.47
6. Step 6: Final answer
   x = 1,313.54