Finding the Fourth Proportional to 60,809, 91,138.62 and 43,183.40

Step by Step Solution

1. Step 1: Write the proportion equation
   60,809 : 91,138.62 = 43,183.40 : x
2. Step 2: Convert to fraction form
   60,809/91,138.62 = 43,183.40/x
3. Step 3: Cross multiply
   60,809x = 91,138.62 × 43,183.40
4. Step 4: Simplify right side
   60,809x = 3,935,675,482.91
5. Step 5: Solve for x
   x = 3,935,675,482.91/60,809
6. Step 6: Final answer
   x = 64,721.92