Finding the Fourth Proportional to 168,061.72, 251,955.62 and 78,161.16

Step by Step Solution

1. Step 1: Write the proportion equation
   168,061.72 : 251,955.62 = 78,161.16 : x
2. Step 2: Convert to fraction form
   168,061.72/251,955.62 = 78,161.16/x
3. Step 3: Cross multiply
   168,061.72x = 251,955.62 × 78,161.16
4. Step 4: Simplify right side
   168,061.72x = 19,693,143,527.72
5. Step 5: Solve for x
   x = 19,693,143,527.72/168,061.72
6. Step 6: Final answer
   x = 117,178.04