Finding the Fourth Proportional to 1,870.62, 2,806.05 and 1,099.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,870.62 : 2,806.05 = 1,099.50 : x
2. Step 2: Convert to fraction form
   1,870.62/2,806.05 = 1,099.50/x
3. Step 3: Cross multiply
   1,870.62x = 2,806.05 × 1,099.50
4. Step 4: Simplify right side
   1,870.62x = 3,085,251.98
5. Step 5: Solve for x
   x = 3,085,251.98/1,870.62
6. Step 6: Final answer
   x = 1,649.32