Finding the Fourth Proportional to 64,795.72, 89,448.10 and 45,691.06

Step by Step Solution

1. Step 1: Write the proportion equation
   64,795.72 : 89,448.10 = 45,691.06 : x
2. Step 2: Convert to fraction form
   64,795.72/89,448.10 = 45,691.06/x
3. Step 3: Cross multiply
   64,795.72x = 89,448.10 × 45,691.06
4. Step 4: Simplify right side
   64,795.72x = 4,086,978,503.99
5. Step 5: Solve for x
   x = 4,086,978,503.99/64,795.72
6. Step 6: Final answer
   x = 63,074.82