Finding the Fourth Proportional to 99,764.46, 137,670.67 and 54,441.31

Step by Step Solution

1. Step 1: Write the proportion equation
   99,764.46 : 137,670.67 = 54,441.31 : x
2. Step 2: Convert to fraction form
   99,764.46/137,670.67 = 54,441.31/x
3. Step 3: Cross multiply
   99,764.46x = 137,670.67 × 54,441.31
4. Step 4: Simplify right side
   99,764.46x = 7,494,971,623.38
5. Step 5: Solve for x
   x = 7,494,971,623.38/99,764.46
6. Step 6: Final answer
   x = 75,126.67