Finding the Fourth Proportional to 10,498.90, 15,750.56 and 3,478.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,498.90 : 15,750.56 = 3,478.51 : x
2. Step 2: Convert to fraction form
   10,498.90/15,750.56 = 3,478.51/x
3. Step 3: Cross multiply
   10,498.90x = 15,750.56 × 3,478.51
4. Step 4: Simplify right side
   10,498.90x = 54,788,480.47
5. Step 5: Solve for x
   x = 54,788,480.47/10,498.90
6. Step 6: Final answer
   x = 5,218.50