Finding the Fourth Proportional to 9,007.77, 12,425.55 and 5,420.25

Step by Step Solution

1. Step 1: Write the proportion equation
   9,007.77 : 12,425.55 = 5,420.25 : x
2. Step 2: Convert to fraction form
   9,007.77/12,425.55 = 5,420.25/x
3. Step 3: Cross multiply
   9,007.77x = 12,425.55 × 5,420.25
4. Step 4: Simplify right side
   9,007.77x = 67,349,587.39
5. Step 5: Solve for x
   x = 67,349,587.39/9,007.77
6. Step 6: Final answer
   x = 7,476.83