Finding the Fourth Proportional to 3,802.72, 5,250.72 and 2,917.12

Step by Step Solution

1. Step 1: Write the proportion equation
   3,802.72 : 5,250.72 = 2,917.12 : x
2. Step 2: Convert to fraction form
   3,802.72/5,250.72 = 2,917.12/x
3. Step 3: Cross multiply
   3,802.72x = 5,250.72 × 2,917.12
4. Step 4: Simplify right side
   3,802.72x = 15,316,980.33
5. Step 5: Solve for x
   x = 15,316,980.33/3,802.72
6. Step 6: Final answer
   x = 4,027.90