Finding the Fourth Proportional to 2,079.86, 3,119.72 and 619.02

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.86 : 3,119.72 = 619.02 : x
2. Step 2: Convert to fraction form
   2,079.86/3,119.72 = 619.02/x
3. Step 3: Cross multiply
   2,079.86x = 3,119.72 × 619.02
4. Step 4: Simplify right side
   2,079.86x = 1,931,169.07
5. Step 5: Solve for x
   x = 1,931,169.07/2,079.86
6. Step 6: Final answer
   x = 928.51