Finding the Fourth Proportional to 1,345.55, 1,856.15 and 847.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.55 : 1,856.15 = 847.25 : x
2. Step 2: Convert to fraction form
   1,345.55/1,856.15 = 847.25/x
3. Step 3: Cross multiply
   1,345.55x = 1,856.15 × 847.25
4. Step 4: Simplify right side
   1,345.55x = 1,572,609.57
5. Step 5: Solve for x
   x = 1,572,609.57/1,345.55
6. Step 6: Final answer
   x = 1,168.75