Finding the Fourth Proportional to 168,056.72, 251,948.12 and 78,156.16

Step by Step Solution

1. Step 1: Write the proportion equation
   168,056.72 : 251,948.12 = 78,156.16 : x
2. Step 2: Convert to fraction form
   168,056.72/251,948.12 = 78,156.16/x
3. Step 3: Cross multiply
   168,056.72x = 251,948.12 × 78,156.16
4. Step 4: Simplify right side
   168,056.72x = 19,691,297,578.42
5. Step 5: Solve for x
   x = 19,691,297,578.42/168,056.72
6. Step 6: Final answer
   x = 117,170.55