Finding the Fourth Proportional to 99,362.24, 137,139.36 and 56,949.20

Step by Step Solution

1. Step 1: Write the proportion equation
   99,362.24 : 137,139.36 = 56,949.20 : x
2. Step 2: Convert to fraction form
   99,362.24/137,139.36 = 56,949.20/x
3. Step 3: Cross multiply
   99,362.24x = 137,139.36 × 56,949.20
4. Step 4: Simplify right side
   99,362.24x = 7,809,976,840.51
5. Step 5: Solve for x
   x = 7,809,976,840.51/99,362.24
6. Step 6: Final answer
   x = 78,601.05