Finding the Fourth Proportional to 12,677.38, 19,019.41 and 4,780.01

Step by Step Solution

1. Step 1: Write the proportion equation
   12,677.38 : 19,019.41 = 4,780.01 : x
2. Step 2: Convert to fraction form
   12,677.38/19,019.41 = 4,780.01/x
3. Step 3: Cross multiply
   12,677.38x = 19,019.41 × 4,780.01
4. Step 4: Simplify right side
   12,677.38x = 90,913,005.59
5. Step 5: Solve for x
   x = 90,913,005.59/12,677.38
6. Step 6: Final answer
   x = 7,171.28