Finding the Fourth Proportional to 1,820.61, 2,512.15 and 1,074.47

Step by Step Solution

1. Step 1: Write the proportion equation
   1,820.61 : 2,512.15 = 1,074.47 : x
2. Step 2: Convert to fraction form
   1,820.61/2,512.15 = 1,074.47/x
3. Step 3: Cross multiply
   1,820.61x = 2,512.15 × 1,074.47
4. Step 4: Simplify right side
   1,820.61x = 2,699,214.56
5. Step 5: Solve for x
   x = 2,699,214.56/1,820.61
6. Step 6: Final answer
   x = 1,482.59