Finding the Fourth Proportional to 116,815.57, 161,191.62 and 65,816.55

Step by Step Solution

1. Step 1: Write the proportion equation
   116,815.57 : 161,191.62 = 65,816.55 : x
2. Step 2: Convert to fraction form
   116,815.57/161,191.62 = 65,816.55/x
3. Step 3: Cross multiply
   116,815.57x = 161,191.62 × 65,816.55
4. Step 4: Simplify right side
   116,815.57x = 10,609,076,317.31
5. Step 5: Solve for x
   x = 10,609,076,317.31/116,815.57
6. Step 6: Final answer
   x = 90,819.03