Finding the Fourth Proportional to 172,978.42, 259,000.23 and 89,697.46

Step by Step Solution

1. Step 1: Write the proportion equation
   172,978.42 : 259,000.23 = 89,697.46 : x
2. Step 2: Convert to fraction form
   172,978.42/259,000.23 = 89,697.46/x
3. Step 3: Cross multiply
   172,978.42x = 259,000.23 × 89,697.46
4. Step 4: Simplify right side
   172,978.42x = 23,231,662,770.42
5. Step 5: Solve for x
   x = 23,231,662,770.42/172,978.42
6. Step 6: Final answer
   x = 134,303.82