Finding the Fourth Proportional to 72,434.89, 99,992.88 and 45,616.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,434.89 : 99,992.88 = 45,616.78 : x
2. Step 2: Convert to fraction form
   72,434.89/99,992.88 = 45,616.78/x
3. Step 3: Cross multiply
   72,434.89x = 99,992.88 × 45,616.78
4. Step 4: Simplify right side
   72,434.89x = 4,561,353,208.53
5. Step 5: Solve for x
   x = 4,561,353,208.53/72,434.89
6. Step 6: Final answer
   x = 62,971.77