Finding the Fourth Proportional to 6,381.31, 9,560.98 and 4,978.50

Step by Step Solution

1. Step 1: Write the proportion equation
   6,381.31 : 9,560.98 = 4,978.50 : x
2. Step 2: Convert to fraction form
   6,381.31/9,560.98 = 4,978.50/x
3. Step 3: Cross multiply
   6,381.31x = 9,560.98 × 4,978.50
4. Step 4: Simplify right side
   6,381.31x = 47,599,330.38
5. Step 5: Solve for x
   x = 47,599,330.38/6,381.31
6. Step 6: Final answer
   x = 7,459.18