Finding the Fourth Proportional to 129,462.69, 178,627.35 and 72,874.05

Step by Step Solution

1. Step 1: Write the proportion equation
   129,462.69 : 178,627.35 = 72,874.05 : x
2. Step 2: Convert to fraction form
   129,462.69/178,627.35 = 72,874.05/x
3. Step 3: Cross multiply
   129,462.69x = 178,627.35 × 72,874.05
4. Step 4: Simplify right side
   129,462.69x = 13,017,298,435.27
5. Step 5: Solve for x
   x = 13,017,298,435.27/129,462.69
6. Step 6: Final answer
   x = 100,548.65