Finding the Fourth Proportional to 99,756.33, 137,667.05 and 54,436.80

Step by Step Solution

1. Step 1: Write the proportion equation
   99,756.33 : 137,667.05 = 54,436.80 : x
2. Step 2: Convert to fraction form
   99,756.33/137,667.05 = 54,436.80/x
3. Step 3: Cross multiply
   99,756.33x = 137,667.05 × 54,436.80
4. Step 4: Simplify right side
   99,756.33x = 7,494,153,667.44
5. Step 5: Solve for x
   x = 7,494,153,667.44/99,756.33
6. Step 6: Final answer
   x = 75,124.59