Finding the Fourth Proportional to 2,399.90, 3,601.24 and 938.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.90 : 3,601.24 = 938.98 : x
2. Step 2: Convert to fraction form
   2,399.90/3,601.24 = 938.98/x
3. Step 3: Cross multiply
   2,399.90x = 3,601.24 × 938.98
4. Step 4: Simplify right side
   2,399.90x = 3,381,492.34
5. Step 5: Solve for x
   x = 3,381,492.34/2,399.90
6. Step 6: Final answer
   x = 1,409.01