Finding the Fourth Proportional to 48,324.72, 72,493.68 and 45,408.72

Step by Step Solution

1. Step 1: Write the proportion equation
   48,324.72 : 72,493.68 = 45,408.72 : x
2. Step 2: Convert to fraction form
   48,324.72/72,493.68 = 45,408.72/x
3. Step 3: Cross multiply
   48,324.72x = 72,493.68 × 45,408.72
4. Step 4: Simplify right side
   48,324.72x = 3,291,845,216.89
5. Step 5: Solve for x
   x = 3,291,845,216.89/48,324.72
6. Step 6: Final answer
   x = 68,119.28