Finding the Fourth Proportional to 8,994.17, 12,419.80 and 5,642.75

Step by Step Solution

1. Step 1: Write the proportion equation
   8,994.17 : 12,419.80 = 5,642.75 : x
2. Step 2: Convert to fraction form
   8,994.17/12,419.80 = 5,642.75/x
3. Step 3: Cross multiply
   8,994.17x = 12,419.80 × 5,642.75
4. Step 4: Simplify right side
   8,994.17x = 70,081,843.39
5. Step 5: Solve for x
   x = 70,081,843.39/8,994.17
6. Step 6: Final answer
   x = 7,791.92