Finding the Fourth Proportional to 72,436.89, 99,995.64 and 45,618.78

Step by Step Solution

1. Step 1: Write the proportion equation
   72,436.89 : 99,995.64 = 45,618.78 : x
2. Step 2: Convert to fraction form
   72,436.89/99,995.64 = 45,618.78/x
3. Step 3: Cross multiply
   72,436.89x = 99,995.64 × 45,618.78
4. Step 4: Simplify right side
   72,436.89x = 4,561,679,102.12
5. Step 5: Solve for x
   x = 4,561,679,102.12/72,436.89
6. Step 6: Final answer
   x = 62,974.53