Finding the Fourth Proportional to 1,347.02, 1,858.89 and 787.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,347.02 : 1,858.89 = 787.28 : x
2. Step 2: Convert to fraction form
   1,347.02/1,858.89 = 787.28/x
3. Step 3: Cross multiply
   1,347.02x = 1,858.89 × 787.28
4. Step 4: Simplify right side
   1,347.02x = 1,463,457.62
5. Step 5: Solve for x
   x = 1,463,457.62/1,347.02
6. Step 6: Final answer
   x = 1,086.44