Finding the Fourth Proportional to 2,079.21, 3,117.17 and 1,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,079.21 : 3,117.17 = 1,200.72 : x
2. Step 2: Convert to fraction form
   2,079.21/3,117.17 = 1,200.72/x
3. Step 3: Cross multiply
   2,079.21x = 3,117.17 × 1,200.72
4. Step 4: Simplify right side
   2,079.21x = 3,742,830.67
5. Step 5: Solve for x
   x = 3,742,830.67/2,079.21
6. Step 6: Final answer
   x = 1,800.12