Finding the Fourth Proportional to 1,621.94, 2,430.86 and 1,036.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,621.94 : 2,430.86 = 1,036.72 : x
2. Step 2: Convert to fraction form
   1,621.94/2,430.86 = 1,036.72/x
3. Step 3: Cross multiply
   1,621.94x = 2,430.86 × 1,036.72
4. Step 4: Simplify right side
   1,621.94x = 2,520,103.84
5. Step 5: Solve for x
   x = 2,520,103.84/1,621.94
6. Step 6: Final answer
   x = 1,553.76