Finding the Fourth Proportional to 116,789.21, 161,158.53 and 65,810.24

Step by Step Solution

1. Step 1: Write the proportion equation
   116,789.21 : 161,158.53 = 65,810.24 : x
2. Step 2: Convert to fraction form
   116,789.21/161,158.53 = 65,810.24/x
3. Step 3: Cross multiply
   116,789.21x = 161,158.53 × 65,810.24
4. Step 4: Simplify right side
   116,789.21x = 10,605,880,731.55
5. Step 5: Solve for x
   x = 10,605,880,731.55/116,789.21
6. Step 6: Final answer
   x = 90,812.17