Finding the Fourth Proportional to 1,030.55, 1,421.89 and 658.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,030.55 : 1,421.89 = 658.06 : x
2. Step 2: Convert to fraction form
   1,030.55/1,421.89 = 658.06/x
3. Step 3: Cross multiply
   1,030.55x = 1,421.89 × 658.06
4. Step 4: Simplify right side
   1,030.55x = 935,683.73
5. Step 5: Solve for x
   x = 935,683.73/1,030.55
6. Step 6: Final answer
   x = 907.95