Finding the Fourth Proportional to 12,448.61, 18,629.04 and 7,770.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,448.61 : 18,629.04 = 7,770.82 : x
2. Step 2: Convert to fraction form
   12,448.61/18,629.04 = 7,770.82/x
3. Step 3: Cross multiply
   12,448.61x = 18,629.04 × 7,770.82
4. Step 4: Simplify right side
   12,448.61x = 144,762,916.61
5. Step 5: Solve for x
   x = 144,762,916.61/12,448.61
6. Step 6: Final answer
   x = 11,628.84