Finding the Fourth Proportional to 120,672.40, 166,520.32 and 72,897.52

Step by Step Solution

1. Step 1: Write the proportion equation
   120,672.40 : 166,520.32 = 72,897.52 : x
2. Step 2: Convert to fraction form
   120,672.40/166,520.32 = 72,897.52/x
3. Step 3: Cross multiply
   120,672.40x = 166,520.32 × 72,897.52
4. Step 4: Simplify right side
   120,672.40x = 12,138,918,357.61
5. Step 5: Solve for x
   x = 12,138,918,357.61/120,672.40
6. Step 6: Final answer
   x = 100,593.99