Finding the Fourth Proportional to 1,053.30, 1,579.42 and 614.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,053.30 : 1,579.42 = 614.71 : x
2. Step 2: Convert to fraction form
   1,053.30/1,579.42 = 614.71/x
3. Step 3: Cross multiply
   1,053.30x = 1,579.42 × 614.71
4. Step 4: Simplify right side
   1,053.30x = 970,885.27
5. Step 5: Solve for x
   x = 970,885.27/1,053.30
6. Step 6: Final answer
   x = 921.76