Finding the Fourth Proportional to 12,987.84, 19,463.83 and 7,429.46

Step by Step Solution

1. Step 1: Write the proportion equation
   12,987.84 : 19,463.83 = 7,429.46 : x
2. Step 2: Convert to fraction form
   12,987.84/19,463.83 = 7,429.46/x
3. Step 3: Cross multiply
   12,987.84x = 19,463.83 × 7,429.46
4. Step 4: Simplify right side
   12,987.84x = 144,605,630.54
5. Step 5: Solve for x
   x = 144,605,630.54/12,987.84
6. Step 6: Final answer
   x = 11,133.92