Finding the Fourth Proportional to 10,080.31, 15,120.81 and 3,506.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,080.31 : 15,120.81 = 3,506.55 : x
2. Step 2: Convert to fraction form
   10,080.31/15,120.81 = 3,506.55/x
3. Step 3: Cross multiply
   10,080.31x = 15,120.81 × 3,506.55
4. Step 4: Simplify right side
   10,080.31x = 53,021,858.77
5. Step 5: Solve for x
   x = 53,021,858.77/10,080.31
6. Step 6: Final answer
   x = 5,259.94