Finding the Fourth Proportional to 1,345.06, 1,856.14 and 785.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,345.06 : 1,856.14 = 785.55 : x
2. Step 2: Convert to fraction form
   1,345.06/1,856.14 = 785.55/x
3. Step 3: Cross multiply
   1,345.06x = 1,856.14 × 785.55
4. Step 4: Simplify right side
   1,345.06x = 1,458,090.78
5. Step 5: Solve for x
   x = 1,458,090.78/1,345.06
6. Step 6: Final answer
   x = 1,084.03