Finding the Fourth Proportional to 8,334.78, 11,501.84 and 4,978.34

Step by Step Solution

1. Step 1: Write the proportion equation
   8,334.78 : 11,501.84 = 4,978.34 : x
2. Step 2: Convert to fraction form
   8,334.78/11,501.84 = 4,978.34/x
3. Step 3: Cross multiply
   8,334.78x = 11,501.84 × 4,978.34
4. Step 4: Simplify right side
   8,334.78x = 57,260,070.15
5. Step 5: Solve for x
   x = 57,260,070.15/8,334.78
6. Step 6: Final answer
   x = 6,870.02