Finding the Fourth Proportional to 71,830.51, 107,745.69 and 19,238.56

Step by Step Solution

1. Step 1: Write the proportion equation
   71,830.51 : 107,745.69 = 19,238.56 : x
2. Step 2: Convert to fraction form
   71,830.51/107,745.69 = 19,238.56/x
3. Step 3: Cross multiply
   71,830.51x = 107,745.69 × 19,238.56
4. Step 4: Simplify right side
   71,830.51x = 2,072,871,921.81
5. Step 5: Solve for x
   x = 2,072,871,921.81/71,830.51
6. Step 6: Final answer
   x = 28,857.82