Finding the Fourth Proportional to 1,405.56, 2,117.85 and 1,167.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,405.56 : 2,117.85 = 1,167.42 : x
2. Step 2: Convert to fraction form
   1,405.56/2,117.85 = 1,167.42/x
3. Step 3: Cross multiply
   1,405.56x = 2,117.85 × 1,167.42
4. Step 4: Simplify right side
   1,405.56x = 2,472,420.45
5. Step 5: Solve for x
   x = 2,472,420.45/1,405.56
6. Step 6: Final answer
   x = 1,759.03