Finding the Fourth Proportional to 1,410.51, 1,945.62 and 990.83

Step by Step Solution

1. Step 1: Write the proportion equation
   1,410.51 : 1,945.62 = 990.83 : x
2. Step 2: Convert to fraction form
   1,410.51/1,945.62 = 990.83/x
3. Step 3: Cross multiply
   1,410.51x = 1,945.62 × 990.83
4. Step 4: Simplify right side
   1,410.51x = 1,927,783.53
5. Step 5: Solve for x
   x = 1,927,783.53/1,410.51
6. Step 6: Final answer
   x = 1,366.72