Finding the Fourth Proportional to 10,762.08, 16,131.57 and 5,207.78

Step by Step Solution

1. Step 1: Write the proportion equation
   10,762.08 : 16,131.57 = 5,207.78 : x
2. Step 2: Convert to fraction form
   10,762.08/16,131.57 = 5,207.78/x
3. Step 3: Cross multiply
   10,762.08x = 16,131.57 × 5,207.78
4. Step 4: Simplify right side
   10,762.08x = 84,009,667.61
5. Step 5: Solve for x
   x = 84,009,667.61/10,762.08
6. Step 6: Final answer
   x = 7,806.08