Finding the Fourth Proportional to 1,345.58, 1,856.32 and 879.02

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.58 : 1,856.32 = 879.02 : x
2. Step 2: Convert to fraction form
   1,345.58/1,856.32 = 879.02/x
3. Step 3: Cross multiply
   1,345.58x = 1,856.32 × 879.02
4. Step 4: Simplify right side
   1,345.58x = 1,631,730.93
5. Step 5: Solve for x
   x = 1,631,730.93/1,345.58
6. Step 6: Final answer
   x = 1,212.66