Finding the Fourth Proportional to 116,721.90, 161,074.10 and 65,734.43

Step by Step Solution

1. Step 1: Write the proportion equation
   116,721.90 : 161,074.10 = 65,734.43 : x
2. Step 2: Convert to fraction form
   116,721.90/161,074.10 = 65,734.43/x
3. Step 3: Cross multiply
   116,721.90x = 161,074.10 × 65,734.43
4. Step 4: Simplify right side
   116,721.90x = 10,588,113,510.23
5. Step 5: Solve for x
   x = 10,588,113,510.23/116,721.90
6. Step 6: Final answer
   x = 90,712.31