Finding the Fourth Proportional to 129,156.03, 178,249.74 and 78,196.83

Step by Step Solution

1. Step 1: Write the proportion equation
   129,156.03 : 178,249.74 = 78,196.83 : x
2. Step 2: Convert to fraction form
   129,156.03/178,249.74 = 78,196.83/x
3. Step 3: Cross multiply
   129,156.03x = 178,249.74 × 78,196.83
4. Step 4: Simplify right side
   129,156.03x = 13,938,564,616.32
5. Step 5: Solve for x
   x = 13,938,564,616.32/129,156.03
6. Step 6: Final answer
   x = 107,920.36