Finding the Fourth Proportional to 1,346.34, 1,857.78 and 786.99

Step by Step Solution

1. Step 1: Write the proportion equation
   1,346.34 : 1,857.78 = 786.99 : x
2. Step 2: Convert to fraction form
   1,346.34/1,857.78 = 786.99/x
3. Step 3: Cross multiply
   1,346.34x = 1,857.78 × 786.99
4. Step 4: Simplify right side
   1,346.34x = 1,462,054.28
5. Step 5: Solve for x
   x = 1,462,054.28/1,346.34
6. Step 6: Final answer
   x = 1,085.95