Finding the Fourth Proportional to 64,793.72, 89,445.35 and 45,689.06

Step by Step Solution

1. Step 1: Write the proportion equation
   64,793.72 : 89,445.35 = 45,689.06 : x
2. Step 2: Convert to fraction form
   64,793.72/89,445.35 = 45,689.06/x
3. Step 3: Cross multiply
   64,793.72x = 89,445.35 × 45,689.06
4. Step 4: Simplify right side
   64,793.72x = 4,086,673,287.20
5. Step 5: Solve for x
   x = 4,086,673,287.20/64,793.72
6. Step 6: Final answer
   x = 63,072.06