Finding the Fourth Proportional to 1,173.34, 1,615.71 and 1,007.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,173.34 : 1,615.71 = 1,007.29 : x
2. Step 2: Convert to fraction form
   1,173.34/1,615.71 = 1,007.29/x
3. Step 3: Cross multiply
   1,173.34x = 1,615.71 × 1,007.29
4. Step 4: Simplify right side
   1,173.34x = 1,627,488.53
5. Step 5: Solve for x
   x = 1,627,488.53/1,173.34
6. Step 6: Final answer
   x = 1,387.06