Finding the Fourth Proportional to 61,609.56, 91,968.69 and 54,136.14

Step by Step Solution

1. Step 1: Write the proportion equation
   61,609.56 : 91,968.69 = 54,136.14 : x
2. Step 2: Convert to fraction form
   61,609.56/91,968.69 = 54,136.14/x
3. Step 3: Cross multiply
   61,609.56x = 91,968.69 × 54,136.14
4. Step 4: Simplify right side
   61,609.56x = 4,978,829,877.46
5. Step 5: Solve for x
   x = 4,978,829,877.46/61,609.56
6. Step 6: Final answer
   x = 80,812.62