Finding the Fourth Proportional to 1,411.24, 1,947.30 and 790.12

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.24 : 1,947.30 = 790.12 : x
2. Step 2: Convert to fraction form
   1,411.24/1,947.30 = 790.12/x
3. Step 3: Cross multiply
   1,411.24x = 1,947.30 × 790.12
4. Step 4: Simplify right side
   1,411.24x = 1,538,600.68
5. Step 5: Solve for x
   x = 1,538,600.68/1,411.24
6. Step 6: Final answer
   x = 1,090.25