Finding the Fourth Proportional to 99,297.77, 137,033.55 and 53,978.81

Step by Step Solution

1. Step 1: Write the proportion equation
   99,297.77 : 137,033.55 = 53,978.81 : x
2. Step 2: Convert to fraction form
   99,297.77/137,033.55 = 53,978.81/x
3. Step 3: Cross multiply
   99,297.77x = 137,033.55 × 53,978.81
4. Step 4: Simplify right side
   99,297.77x = 7,396,907,273.91
5. Step 5: Solve for x
   x = 7,396,907,273.91/99,297.77
6. Step 6: Final answer
   x = 74,492.18