Finding the Fourth Proportional to 103,058.38, 154,386.28 and 71,031.72

Step by Step Solution

1. Step 1: Write the proportion equation
   103,058.38 : 154,386.28 = 71,031.72 : x
2. Step 2: Convert to fraction form
   103,058.38/154,386.28 = 71,031.72/x
3. Step 3: Cross multiply
   103,058.38x = 154,386.28 × 71,031.72
4. Step 4: Simplify right side
   103,058.38x = 10,966,323,012.80
5. Step 5: Solve for x
   x = 10,966,323,012.80/103,058.38
6. Step 6: Final answer
   x = 106,408.84