Finding the Fourth Proportional to 12,572.06, 18,860.52 and 4,780.27

Step by Step Solution

1. Step 1: Write the proportion equation
   12,572.06 : 18,860.52 = 4,780.27 : x
2. Step 2: Convert to fraction form
   12,572.06/18,860.52 = 4,780.27/x
3. Step 3: Cross multiply
   12,572.06x = 18,860.52 × 4,780.27
4. Step 4: Simplify right side
   12,572.06x = 90,158,313.35
5. Step 5: Solve for x
   x = 90,158,313.35/12,572.06
6. Step 6: Final answer
   x = 7,171.32