Finding the Fourth Proportional to 1,358.31, 1,874.47 and 768.84

Step by Step Solution

1. Step 1: Write the proportion equation
   1,358.31 : 1,874.47 = 768.84 : x
2. Step 2: Convert to fraction form
   1,358.31/1,874.47 = 768.84/x
3. Step 3: Cross multiply
   1,358.31x = 1,874.47 × 768.84
4. Step 4: Simplify right side
   1,358.31x = 1,441,167.51
5. Step 5: Solve for x
   x = 1,441,167.51/1,358.31
6. Step 6: Final answer
   x = 1,061.00