Finding the Fourth Proportional to 99,768.56, 137,683.52 and 54,449.46

Step by Step Solution

1. Step 1: Write the proportion equation
   99,768.56 : 137,683.52 = 54,449.46 : x
2. Step 2: Convert to fraction form
   99,768.56/137,683.52 = 54,449.46/x
3. Step 3: Cross multiply
   99,768.56x = 137,683.52 × 54,449.46
4. Step 4: Simplify right side
   99,768.56x = 7,496,793,314.90
5. Step 5: Solve for x
   x = 7,496,793,314.90/99,768.56
6. Step 6: Final answer
   x = 75,141.84