Finding the Fourth Proportional to 3,699.96, 5,106.78 and 2,521.50

Step by Step Solution

1. Step 1: Write the proportion equation
   3,699.96 : 5,106.78 = 2,521.50 : x
2. Step 2: Convert to fraction form
   3,699.96/5,106.78 = 2,521.50/x
3. Step 3: Cross multiply
   3,699.96x = 5,106.78 × 2,521.50
4. Step 4: Simplify right side
   3,699.96x = 12,876,745.77
5. Step 5: Solve for x
   x = 12,876,745.77/3,699.96
6. Step 6: Final answer
   x = 3,480.24