Finding the Fourth Proportional to 1,030.53, 1,422.25 and 715.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.53 : 1,422.25 = 715.71 : x
2. Step 2: Convert to fraction form
   1,030.53/1,422.25 = 715.71/x
3. Step 3: Cross multiply
   1,030.53x = 1,422.25 × 715.71
4. Step 4: Simplify right side
   1,030.53x = 1,017,916.76
5. Step 5: Solve for x
   x = 1,017,916.76/1,030.53
6. Step 6: Final answer
   x = 987.76