Finding the Fourth Proportional to 120,404.52, 166,155.72 and 66,689.32

Step by Step Solution

1. Step 1: Write the proportion equation
   120,404.52 : 166,155.72 = 66,689.32 : x
2. Step 2: Convert to fraction form
   120,404.52/166,155.72 = 66,689.32/x
3. Step 3: Cross multiply
   120,404.52x = 166,155.72 × 66,689.32
4. Step 4: Simplify right side
   120,404.52x = 11,080,811,980.91
5. Step 5: Solve for x
   x = 11,080,811,980.91/120,404.52
6. Step 6: Final answer
   x = 92,029.87