Finding the Fourth Proportional to 12,940.98, 19,415.57 and 4,620.82

Step by Step Solution

1. Step 1: Write the proportion equation
   12,940.98 : 19,415.57 = 4,620.82 : x
2. Step 2: Convert to fraction form
   12,940.98/19,415.57 = 4,620.82/x
3. Step 3: Cross multiply
   12,940.98x = 19,415.57 × 4,620.82
4. Step 4: Simplify right side
   12,940.98x = 89,715,854.17
5. Step 5: Solve for x
   x = 89,715,854.17/12,940.98
6. Step 6: Final answer
   x = 6,932.69