Finding the Fourth Proportional to 12,912.72, 19,365.81 and 5,012.52

Step by Step Solution

1. Step 1: Write the proportion equation
   12,912.72 : 19,365.81 = 5,012.52 : x
2. Step 2: Convert to fraction form
   12,912.72/19,365.81 = 5,012.52/x
3. Step 3: Cross multiply
   12,912.72x = 19,365.81 × 5,012.52
4. Step 4: Simplify right side
   12,912.72x = 97,071,509.94
5. Step 5: Solve for x
   x = 97,071,509.94/12,912.72
6. Step 6: Final answer
   x = 7,517.51