Finding the Fourth Proportional to 116,957.15, 161,401.77 and 64,570.75

Step by Step Solution

1. Step 1: Write the proportion equation
   116,957.15 : 161,401.77 = 64,570.75 : x
2. Step 2: Convert to fraction form
   116,957.15/161,401.77 = 64,570.75/x
3. Step 3: Cross multiply
   116,957.15x = 161,401.77 × 64,570.75
4. Step 4: Simplify right side
   116,957.15x = 10,421,833,340.23
5. Step 5: Solve for x
   x = 10,421,833,340.23/116,957.15
6. Step 6: Final answer
   x = 89,108.14