Finding the Fourth Proportional to 116,971.43, 161,422.20 and 65,986.52

Step by Step Solution

1. Step 1: Write the proportion equation
   116,971.43 : 161,422.20 = 65,986.52 : x
2. Step 2: Convert to fraction form
   116,971.43/161,422.20 = 65,986.52/x
3. Step 3: Cross multiply
   116,971.43x = 161,422.20 × 65,986.52
4. Step 4: Simplify right side
   116,971.43x = 10,651,688,421.63
5. Step 5: Solve for x
   x = 10,651,688,421.63/116,971.43
6. Step 6: Final answer
   x = 91,062.31