Finding the Fourth Proportional to 1,007.02, 1,389.27 and 633.34

Step by Step Solution

1. Step 1: Write the proportion equation
   1,007.02 : 1,389.27 = 633.34 : x
2. Step 2: Convert to fraction form
   1,007.02/1,389.27 = 633.34/x
3. Step 3: Cross multiply
   1,007.02x = 1,389.27 × 633.34
4. Step 4: Simplify right side
   1,007.02x = 879,880.26
5. Step 5: Solve for x
   x = 879,880.26/1,007.02
6. Step 6: Final answer
   x = 873.75