Finding the Fourth Proportional to 10,075.81, 13,900.87 and 6,245.72

Step by Step Solution

1. Step 1: Write the proportion equation
   10,075.81 : 13,900.87 = 6,245.72 : x
2. Step 2: Convert to fraction form
   10,075.81/13,900.87 = 6,245.72/x
3. Step 3: Cross multiply
   10,075.81x = 13,900.87 × 6,245.72
4. Step 4: Simplify right side
   10,075.81x = 86,820,941.78
5. Step 5: Solve for x
   x = 86,820,941.78/10,075.81
6. Step 6: Final answer
   x = 8,616.77