Finding the Fourth Proportional to 131,625, 181,642.50 and 72,009

Step by Step Solution

1. Step 1: Write the proportion equation
   131,625 : 181,642.50 = 72,009 : x
2. Step 2: Convert to fraction form
   131,625/181,642.50 = 72,009/x
3. Step 3: Cross multiply
   131,625x = 181,642.50 × 72,009
4. Step 4: Simplify right side
   131,625x = 13,079,894,782.50
5. Step 5: Solve for x
   x = 13,079,894,782.50/131,625
6. Step 6: Final answer
   x = 99,372.42