Finding the Fourth Proportional to 12,687.03, 19,019.61 and 4,901.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,687.03 : 19,019.61 = 4,901.31 : x
2. Step 2: Convert to fraction form
   12,687.03/19,019.61 = 4,901.31/x
3. Step 3: Cross multiply
   12,687.03x = 19,019.61 × 4,901.31
4. Step 4: Simplify right side
   12,687.03x = 93,221,004.69
5. Step 5: Solve for x
   x = 93,221,004.69/12,687.03
6. Step 6: Final answer
   x = 7,347.74