Finding the Fourth Proportional to 99,477.77, 149,016.78 and 49,406.40

Step by Step Solution

1. Step 1: Write the proportion equation
   99,477.77 : 149,016.78 = 49,406.40 : x
2. Step 2: Convert to fraction form
   99,477.77/149,016.78 = 49,406.40/x
3. Step 3: Cross multiply
   99,477.77x = 149,016.78 × 49,406.40
4. Step 4: Simplify right side
   99,477.77x = 7,362,382,639.39
5. Step 5: Solve for x
   x = 7,362,382,639.39/99,477.77
6. Step 6: Final answer
   x = 74,010.33