Finding the Fourth Proportional to 13,768.31, 19,000.42 and 7,480.69

Step by Step Solution

1. Step 1: Write the proportion equation
   13,768.31 : 19,000.42 = 7,480.69 : x
2. Step 2: Convert to fraction form
   13,768.31/19,000.42 = 7,480.69/x
3. Step 3: Cross multiply
   13,768.31x = 19,000.42 × 7,480.69
4. Step 4: Simplify right side
   13,768.31x = 142,136,227.77
5. Step 5: Solve for x
   x = 142,136,227.77/13,768.31
6. Step 6: Final answer
   x = 10,323.43