Finding the Fourth Proportional to 105,017.62, 157,621.12 and 71,201.84

Step by Step Solution

1. Step 1: Write the proportion equation
   105,017.62 : 157,621.12 = 71,201.84 : x
2. Step 2: Convert to fraction form
   105,017.62/157,621.12 = 71,201.84/x
3. Step 3: Cross multiply
   105,017.62x = 157,621.12 × 71,201.84
4. Step 4: Simplify right side
   105,017.62x = 11,222,913,766.86
5. Step 5: Solve for x
   x = 11,222,913,766.86/105,017.62
6. Step 6: Final answer
   x = 106,866.96