Finding the Fourth Proportional to 1,346.56, 1,858.05 and 787.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.56 : 1,858.05 = 787.05 : x
2. Step 2: Convert to fraction form
   1,346.56/1,858.05 = 787.05/x
3. Step 3: Cross multiply
   1,346.56x = 1,858.05 × 787.05
4. Step 4: Simplify right side
   1,346.56x = 1,462,378.25
5. Step 5: Solve for x
   x = 1,462,378.25/1,346.56
6. Step 6: Final answer
   x = 1,086.01