Finding the Fourth Proportional to 99,804.18, 137,724.51 and 54,473.37

Step by Step Solution

1. Step 1: Write the proportion equation
   99,804.18 : 137,724.51 = 54,473.37 : x
2. Step 2: Convert to fraction form
   99,804.18/137,724.51 = 54,473.37/x
3. Step 3: Cross multiply
   99,804.18x = 137,724.51 × 54,473.37
4. Step 4: Simplify right side
   99,804.18x = 7,502,318,191.30
5. Step 5: Solve for x
   x = 7,502,318,191.30/99,804.18
6. Step 6: Final answer
   x = 75,170.38