Finding the Fourth Proportional to 5,159.94, 7,120.72 and 2,802.12

Step by Step Solution

1. Step 1: Write the proportion equation
   5,159.94 : 7,120.72 = 2,802.12 : x
2. Step 2: Convert to fraction form
   5,159.94/7,120.72 = 2,802.12/x
3. Step 3: Cross multiply
   5,159.94x = 7,120.72 × 2,802.12
4. Step 4: Simplify right side
   5,159.94x = 19,953,111.93
5. Step 5: Solve for x
   x = 19,953,111.93/5,159.94
6. Step 6: Final answer
   x = 3,866.93