Finding the Fourth Proportional to 1,362.24, 1,875.96 and 1,290.96

Step by Step Solution

1. Step 1: Write the proportion equation
   1,362.24 : 1,875.96 = 1,290.96 : x
2. Step 2: Convert to fraction form
   1,362.24/1,875.96 = 1,290.96/x
3. Step 3: Cross multiply
   1,362.24x = 1,875.96 × 1,290.96
4. Step 4: Simplify right side
   1,362.24x = 2,421,789.32
5. Step 5: Solve for x
   x = 2,421,789.32/1,362.24
6. Step 6: Final answer
   x = 1,777.80