Finding the Fourth Proportional to 10,612.72, 15,920.75 and 3,494.71

Step by Step Solution

1. Step 1: Write the proportion equation
   10,612.72 : 15,920.75 = 3,494.71 : x
2. Step 2: Convert to fraction form
   10,612.72/15,920.75 = 3,494.71/x
3. Step 3: Cross multiply
   10,612.72x = 15,920.75 × 3,494.71
4. Step 4: Simplify right side
   10,612.72x = 55,638,404.23
5. Step 5: Solve for x
   x = 55,638,404.23/10,612.72
6. Step 6: Final answer
   x = 5,242.61