Finding the Fourth Proportional to 116,978.97, 161,356.66 and 76,695.34

Step by Step Solution

1. Step 1: Write the proportion equation
   116,978.97 : 161,356.66 = 76,695.34 : x
2. Step 2: Convert to fraction form
   116,978.97/161,356.66 = 76,695.34/x
3. Step 3: Cross multiply
   116,978.97x = 161,356.66 × 76,695.34
4. Step 4: Simplify right side
   116,978.97x = 12,375,303,899.96
5. Step 5: Solve for x
   x = 12,375,303,899.96/116,978.97
6. Step 6: Final answer
   x = 105,790.84