Finding the Fourth Proportional to 99,386.93, 137,151.50 and 56,942.73

Step by Step Solution

1. Step 1: Write the proportion equation
   99,386.93 : 137,151.50 = 56,942.73 : x
2. Step 2: Convert to fraction form
   99,386.93/137,151.50 = 56,942.73/x
3. Step 3: Cross multiply
   99,386.93x = 137,151.50 × 56,942.73
4. Step 4: Simplify right side
   99,386.93x = 7,809,780,548.88
5. Step 5: Solve for x
   x = 7,809,780,548.88/99,386.93
6. Step 6: Final answer
   x = 78,579.55