Finding the Fourth Proportional to 1,030.18, 1,422.08 and 715.38

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.18 : 1,422.08 = 715.38 : x
2. Step 2: Convert to fraction form
   1,030.18/1,422.08 = 715.38/x
3. Step 3: Cross multiply
   1,030.18x = 1,422.08 × 715.38
4. Step 4: Simplify right side
   1,030.18x = 1,017,327.59
5. Step 5: Solve for x
   x = 1,017,327.59/1,030.18
6. Step 6: Final answer
   x = 987.52