Finding the Fourth Proportional to 1,074.86, 1,620.32 and 1,003.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,074.86 : 1,620.32 = 1,003.42 : x
2. Step 2: Convert to fraction form
   1,074.86/1,620.32 = 1,003.42/x
3. Step 3: Cross multiply
   1,074.86x = 1,620.32 × 1,003.42
4. Step 4: Simplify right side
   1,074.86x = 1,625,861.49
5. Step 5: Solve for x
   x = 1,625,861.49/1,074.86
6. Step 6: Final answer
   x = 1,512.63