Finding the Fourth Proportional to 10,386.09, 15,569.42 and 3,810.51

Step by Step Solution

1. Step 1: Write the proportion equation
   10,386.09 : 15,569.42 = 3,810.51 : x
2. Step 2: Convert to fraction form
   10,386.09/15,569.42 = 3,810.51/x
3. Step 3: Cross multiply
   10,386.09x = 15,569.42 × 3,810.51
4. Step 4: Simplify right side
   10,386.09x = 59,327,411.55
5. Step 5: Solve for x
   x = 59,327,411.55/10,386.09
6. Step 6: Final answer
   x = 5,712.20