Finding the Fourth Proportional to 99,379.56, 137,149.38 and 56,945.16

Step by Step Solution

1. Step 1: Write the proportion equation
   99,379.56 : 137,149.38 = 56,945.16 : x
2. Step 2: Convert to fraction form
   99,379.56/137,149.38 = 56,945.16/x
3. Step 3: Cross multiply
   99,379.56x = 137,149.38 × 56,945.16
4. Step 4: Simplify right side
   99,379.56x = 7,809,993,388.00
5. Step 5: Solve for x
   x = 7,809,993,388.00/99,379.56
6. Step 6: Final answer
   x = 78,587.52