Finding the Fourth Proportional to 1,350.78, 1,865.10 and 1,055.53

Step by Step Solution

1. Step 1: Write the proportion equation
   1,350.78 : 1,865.10 = 1,055.53 : x
2. Step 2: Convert to fraction form
   1,350.78/1,865.10 = 1,055.53/x
3. Step 3: Cross multiply
   1,350.78x = 1,865.10 × 1,055.53
4. Step 4: Simplify right side
   1,350.78x = 1,968,669.00
5. Step 5: Solve for x
   x = 1,968,669.00/1,350.78
6. Step 6: Final answer
   x = 1,457.43