Finding the Fourth Proportional to 1,002.60, 1,384.23 and 630.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,002.60 : 1,384.23 = 630.09 : x
2. Step 2: Convert to fraction form
   1,002.60/1,384.23 = 630.09/x
3. Step 3: Cross multiply
   1,002.60x = 1,384.23 × 630.09
4. Step 4: Simplify right side
   1,002.60x = 872,189.48
5. Step 5: Solve for x
   x = 872,189.48/1,002.60
6. Step 6: Final answer
   x = 869.93