Finding the Fourth Proportional to 10,499.97, 15,750.78 and 3,479.70

Step by Step Solution

1. Step 1: Write the proportion equation
   10,499.97 : 15,750.78 = 3,479.70 : x
2. Step 2: Convert to fraction form
   10,499.97/15,750.78 = 3,479.70/x
3. Step 3: Cross multiply
   10,499.97x = 15,750.78 × 3,479.70
4. Step 4: Simplify right side
   10,499.97x = 54,807,989.17
5. Step 5: Solve for x
   x = 54,807,989.17/10,499.97
6. Step 6: Final answer
   x = 5,219.82