Finding the Fourth Proportional to 1,359.32, 2,041.72 and 812.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,359.32 : 2,041.72 = 812.58 : x
2. Step 2: Convert to fraction form
   1,359.32/2,041.72 = 812.58/x
3. Step 3: Cross multiply
   1,359.32x = 2,041.72 × 812.58
4. Step 4: Simplify right side
   1,359.32x = 1,659,060.84
5. Step 5: Solve for x
   x = 1,659,060.84/1,359.32
6. Step 6: Final answer
   x = 1,220.51