Finding the Fourth Proportional to 2,915.89, 4,370.81 and 1,663.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,915.89 : 4,370.81 = 1,663.81 : x
2. Step 2: Convert to fraction form
   2,915.89/4,370.81 = 1,663.81/x
3. Step 3: Cross multiply
   2,915.89x = 4,370.81 × 1,663.81
4. Step 4: Simplify right side
   2,915.89x = 7,272,197.39
5. Step 5: Solve for x
   x = 7,272,197.39/2,915.89
6. Step 6: Final answer
   x = 2,493.99