Finding the Fourth Proportional to 10,212.78, 15,320.61 and 3,637.02

Step by Step Solution

1. Step 1: Write the proportion equation
   10,212.78 : 15,320.61 = 3,637.02 : x
2. Step 2: Convert to fraction form
   10,212.78/15,320.61 = 3,637.02/x
3. Step 3: Cross multiply
   10,212.78x = 15,320.61 × 3,637.02
4. Step 4: Simplify right side
   10,212.78x = 55,721,364.98
5. Step 5: Solve for x
   x = 55,721,364.98/10,212.78
6. Step 6: Final answer
   x = 5,456.04