Finding the Fourth Proportional to 99,619.24, 149,647.83 and 60,199.78

Step by Step Solution

1. Step 1: Write the proportion equation
   99,619.24 : 149,647.83 = 60,199.78 : x
2. Step 2: Convert to fraction form
   99,619.24/149,647.83 = 60,199.78/x
3. Step 3: Cross multiply
   99,619.24x = 149,647.83 × 60,199.78
4. Step 4: Simplify right side
   99,619.24x = 9,008,766,443.48
5. Step 5: Solve for x
   x = 9,008,766,443.48/99,619.24
6. Step 6: Final answer
   x = 90,431.99