Finding the Fourth Proportional to 3,512.69, 5,269.34 and 915.63

Step by Step Solution

1. Step 1: Write the proportion equation
   3,512.69 : 5,269.34 = 915.63 : x
2. Step 2: Convert to fraction form
   3,512.69/5,269.34 = 915.63/x
3. Step 3: Cross multiply
   3,512.69x = 5,269.34 × 915.63
4. Step 4: Simplify right side
   3,512.69x = 4,824,734.86
5. Step 5: Solve for x
   x = 4,824,734.86/3,512.69
6. Step 6: Final answer
   x = 1,373.52