Finding the Fourth Proportional to 99,216.72, 136,920.51 and 53,895.54

Step by Step Solution

1. Step 1: Write the proportion equation
   99,216.72 : 136,920.51 = 53,895.54 : x
2. Step 2: Convert to fraction form
   99,216.72/136,920.51 = 53,895.54/x
3. Step 3: Cross multiply
   99,216.72x = 136,920.51 × 53,895.54
4. Step 4: Simplify right side
   99,216.72x = 7,379,404,823.53
5. Step 5: Solve for x
   x = 7,379,404,823.53/99,216.72
6. Step 6: Final answer
   x = 74,376.63