Finding the Fourth Proportional to 2,379.61, 3,553.21 and 2,099.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,379.61 : 3,553.21 = 2,099.63 : x
2. Step 2: Convert to fraction form
   2,379.61/3,553.21 = 2,099.63/x
3. Step 3: Cross multiply
   2,379.61x = 3,553.21 × 2,099.63
4. Step 4: Simplify right side
   2,379.61x = 7,460,411.17
5. Step 5: Solve for x
   x = 7,460,411.17/2,379.61
6. Step 6: Final answer
   x = 3,135.14