Finding the Fourth Proportional to 64,664.43, 89,186.36 and 42,010.72

Step by Step Solution

1. Step 1: Write the proportion equation
   64,664.43 : 89,186.36 = 42,010.72 : x
2. Step 2: Convert to fraction form
   64,664.43/89,186.36 = 42,010.72/x
3. Step 3: Cross multiply
   64,664.43x = 89,186.36 × 42,010.72
4. Step 4: Simplify right side
   64,664.43x = 3,746,783,197.78
5. Step 5: Solve for x
   x = 3,746,783,197.78/64,664.43
6. Step 6: Final answer
   x = 57,941.95