Finding the Fourth Proportional to 10,556.02, 15,831.60 and 7,290.10

Step by Step Solution

1. Step 1: Write the proportion equation
   10,556.02 : 15,831.60 = 7,290.10 : x
2. Step 2: Convert to fraction form
   10,556.02/15,831.60 = 7,290.10/x
3. Step 3: Cross multiply
   10,556.02x = 15,831.60 × 7,290.10
4. Step 4: Simplify right side
   10,556.02x = 115,413,947.16
5. Step 5: Solve for x
   x = 115,413,947.16/10,556.02
6. Step 6: Final answer
   x = 10,933.47