Finding the Fourth Proportional to 99,849.27, 137,786.84 and 54,518.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,849.27 : 137,786.84 = 54,518.50 : x
2. Step 2: Convert to fraction form
   99,849.27/137,786.84 = 54,518.50/x
3. Step 3: Cross multiply
   99,849.27x = 137,786.84 × 54,518.50
4. Step 4: Simplify right side
   99,849.27x = 7,511,931,940.63
5. Step 5: Solve for x
   x = 7,511,931,940.63/99,849.27
6. Step 6: Final answer
   x = 75,232.71