Finding the Fourth Proportional to 12,881.15, 19,314.63 and 3,994.02

Step by Step Solution

1. Step 1: Write the proportion equation
   12,881.15 : 19,314.63 = 3,994.02 : x
2. Step 2: Convert to fraction form
   12,881.15/19,314.63 = 3,994.02/x
3. Step 3: Cross multiply
   12,881.15x = 19,314.63 × 3,994.02
4. Step 4: Simplify right side
   12,881.15x = 77,143,018.51
5. Step 5: Solve for x
   x = 77,143,018.51/12,881.15
6. Step 6: Final answer
   x = 5,988.83