Finding the Fourth Proportional to 1,345.52, 1,856.58 and 879.50

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.52 : 1,856.58 = 879.50 : x
2. Step 2: Convert to fraction form
   1,345.52/1,856.58 = 879.50/x
3. Step 3: Cross multiply
   1,345.52x = 1,856.58 × 879.50
4. Step 4: Simplify right side
   1,345.52x = 1,632,862.11
5. Step 5: Solve for x
   x = 1,632,862.11/1,345.52
6. Step 6: Final answer
   x = 1,213.55