Finding the Fourth Proportional to 113,816.21, 157,087.55 and 65,446.45

Step by Step Solution

1. Step 1: Write the proportion equation
   113,816.21 : 157,087.55 = 65,446.45 : x
2. Step 2: Convert to fraction form
   113,816.21/157,087.55 = 65,446.45/x
3. Step 3: Cross multiply
   113,816.21x = 157,087.55 × 65,446.45
4. Step 4: Simplify right side
   113,816.21x = 10,280,822,257.59
5. Step 5: Solve for x
   x = 10,280,822,257.59/113,816.21
6. Step 6: Final answer
   x = 90,328.28