Finding the Fourth Proportional to 111,058.47, 165,715.43 and 104,280.12

Step by Step Solution

1. Step 1: Write the proportion equation
   111,058.47 : 165,715.43 = 104,280.12 : x
2. Step 2: Convert to fraction form
   111,058.47/165,715.43 = 104,280.12/x
3. Step 3: Cross multiply
   111,058.47x = 165,715.43 × 104,280.12
4. Step 4: Simplify right side
   111,058.47x = 17,280,824,404.85
5. Step 5: Solve for x
   x = 17,280,824,404.85/111,058.47
6. Step 6: Final answer
   x = 155,601.14