Finding the Fourth Proportional to 91,683.26, 137,683.44 and 54,477.12

Step by Step Solution

1. Step 1: Write the proportion equation
   91,683.26 : 137,683.44 = 54,477.12 : x
2. Step 2: Convert to fraction form
   91,683.26/137,683.44 = 54,477.12/x
3. Step 3: Cross multiply
   91,683.26x = 137,683.44 × 54,477.12
4. Step 4: Simplify right side
   91,683.26x = 7,500,597,282.89
5. Step 5: Solve for x
   x = 7,500,597,282.89/91,683.26
6. Step 6: Final answer
   x = 81,809.89