Finding the Fourth Proportional to 1,808.46, 2,495.34 and 1,561.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,808.46 : 2,495.34 = 1,561.95 : x
2. Step 2: Convert to fraction form
   1,808.46/2,495.34 = 1,561.95/x
3. Step 3: Cross multiply
   1,808.46x = 2,495.34 × 1,561.95
4. Step 4: Simplify right side
   1,808.46x = 3,897,596.31
5. Step 5: Solve for x
   x = 3,897,596.31/1,808.46
6. Step 6: Final answer
   x = 2,155.20