Finding the Fourth Proportional to 65,136.96, 89,877.54 and 39,994.56

Step by Step Solution

1. Step 1: Write the proportion equation
   65,136.96 : 89,877.54 = 39,994.56 : x
2. Step 2: Convert to fraction form
   65,136.96/89,877.54 = 39,994.56/x
3. Step 3: Cross multiply
   65,136.96x = 89,877.54 × 39,994.56
4. Step 4: Simplify right side
   65,136.96x = 3,594,612,666.18
5. Step 5: Solve for x
   x = 3,594,612,666.18/65,136.96
6. Step 6: Final answer
   x = 55,185.45