Finding the Fourth Proportional to 12,926.52, 19,400.82 and 5,140.80

Step by Step Solution

1. Step 1: Write the proportion equation
   12,926.52 : 19,400.82 = 5,140.80 : x
2. Step 2: Convert to fraction form
   12,926.52/19,400.82 = 5,140.80/x
3. Step 3: Cross multiply
   12,926.52x = 19,400.82 × 5,140.80
4. Step 4: Simplify right side
   12,926.52x = 99,735,735.46
5. Step 5: Solve for x
   x = 99,735,735.46/12,926.52
6. Step 6: Final answer
   x = 7,715.59