Finding the Fourth Proportional to 12,780.14, 19,181.20 and 4,994.42

Step by Step Solution

1. Step 1: Write the proportion equation
   12,780.14 : 19,181.20 = 4,994.42 : x
2. Step 2: Convert to fraction form
   12,780.14/19,181.20 = 4,994.42/x
3. Step 3: Cross multiply
   12,780.14x = 19,181.20 × 4,994.42
4. Step 4: Simplify right side
   12,780.14x = 95,798,968.90
5. Step 5: Solve for x
   x = 95,798,968.90/12,780.14
6. Step 6: Final answer
   x = 7,495.92