Finding the Fourth Proportional to 1,362.02, 1,878.54 and 990.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.02 : 1,878.54 = 990.23 : x
2. Step 2: Convert to fraction form
   1,362.02/1,878.54 = 990.23/x
3. Step 3: Cross multiply
   1,362.02x = 1,878.54 × 990.23
4. Step 4: Simplify right side
   1,362.02x = 1,860,179.13
5. Step 5: Solve for x
   x = 1,860,179.13/1,362.02
6. Step 6: Final answer
   x = 1,365.76