Finding the Fourth Proportional to 172,845.60, 259,164.72 and 67,539.12

Step by Step Solution

1. Step 1: Write the proportion equation
   172,845.60 : 259,164.72 = 67,539.12 : x
2. Step 2: Convert to fraction form
   172,845.60/259,164.72 = 67,539.12/x
3. Step 3: Cross multiply
   172,845.60x = 259,164.72 × 67,539.12
4. Step 4: Simplify right side
   172,845.60x = 17,503,757,123.85
5. Step 5: Solve for x
   x = 17,503,757,123.85/172,845.60
6. Step 6: Final answer
   x = 101,268.17