Finding the Fourth Proportional to 132,131.45, 182,429.21 and 78,433.72

Step by Step Solution

1. Step 1: Write the proportion equation
   132,131.45 : 182,429.21 = 78,433.72 : x
2. Step 2: Convert to fraction form
   132,131.45/182,429.21 = 78,433.72/x
3. Step 3: Cross multiply
   132,131.45x = 182,429.21 × 78,433.72
4. Step 4: Simplify right side
   132,131.45x = 14,308,601,316.97
5. Step 5: Solve for x
   x = 14,308,601,316.97/132,131.45
6. Step 6: Final answer
   x = 108,290.65