Finding the Fourth Proportional to 7,777.61, 10,729.22 and 5,124.05

Step by Step Solution

1. Step 1: Write the proportion equation
   7,777.61 : 10,729.22 = 5,124.05 : x
2. Step 2: Convert to fraction form
   7,777.61/10,729.22 = 5,124.05/x
3. Step 3: Cross multiply
   7,777.61x = 10,729.22 × 5,124.05
4. Step 4: Simplify right side
   7,777.61x = 54,977,059.74
5. Step 5: Solve for x
   x = 54,977,059.74/7,777.61
6. Step 6: Final answer
   x = 7,068.63