Finding the Fourth Proportional to 172,978.50, 259,468.02 and 48,319.50

Step by Step Solution

1. Step 1: Write the proportion equation
   172,978.50 : 259,468.02 = 48,319.50 : x
2. Step 2: Convert to fraction form
   172,978.50/259,468.02 = 48,319.50/x
3. Step 3: Cross multiply
   172,978.50x = 259,468.02 × 48,319.50
4. Step 4: Simplify right side
   172,978.50x = 12,537,364,992.39
5. Step 5: Solve for x
   x = 12,537,364,992.39/172,978.50
6. Step 6: Final answer
   x = 72,479.33