Finding the Fourth Proportional to 7,978.63, 11,003.34 and 4,994.74

Step by Step Solution

1. Step 1: Write the proportion equation
   7,978.63 : 11,003.34 = 4,994.74 : x
2. Step 2: Convert to fraction form
   7,978.63/11,003.34 = 4,994.74/x
3. Step 3: Cross multiply
   7,978.63x = 11,003.34 × 4,994.74
4. Step 4: Simplify right side
   7,978.63x = 54,958,822.43
5. Step 5: Solve for x
   x = 54,958,822.43/7,978.63
6. Step 6: Final answer
   x = 6,888.25