Finding the Fourth Proportional to 2,099.59, 2,897.50 and 1,215.67

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.59 : 2,897.50 = 1,215.67 : x
2. Step 2: Convert to fraction form
   2,099.59/2,897.50 = 1,215.67/x
3. Step 3: Cross multiply
   2,099.59x = 2,897.50 × 1,215.67
4. Step 4: Simplify right side
   2,099.59x = 3,522,397.75
5. Step 5: Solve for x
   x = 3,522,397.75/2,099.59
6. Step 6: Final answer
   x = 1,677.66