Finding the Fourth Proportional to 13,020.51, 19,488.15 and 7,082.57

Step by Step Solution

1. Step 1: Write the proportion equation
   13,020.51 : 19,488.15 = 7,082.57 : x
2. Step 2: Convert to fraction form
   13,020.51/19,488.15 = 7,082.57/x
3. Step 3: Cross multiply
   13,020.51x = 19,488.15 × 7,082.57
4. Step 4: Simplify right side
   13,020.51x = 138,026,089.10
5. Step 5: Solve for x
   x = 138,026,089.10/13,020.51
6. Step 6: Final answer
   x = 10,600.67