Finding the Fourth Proportional to 7,807.98, 11,715.82 and 3,647.39

Step by Step Solution

1. Step 1: Write the proportion equation
   7,807.98 : 11,715.82 = 3,647.39 : x
2. Step 2: Convert to fraction form
   7,807.98/11,715.82 = 3,647.39/x
3. Step 3: Cross multiply
   7,807.98x = 11,715.82 × 3,647.39
4. Step 4: Simplify right side
   7,807.98x = 42,732,164.71
5. Step 5: Solve for x
   x = 42,732,164.71/7,807.98
6. Step 6: Final answer
   x = 5,472.88