Finding the Fourth Proportional to 261,109.73, 391,622.55 and 71,525.78

Step by Step Solution

1. Step 1: Write the proportion equation
   261,109.73 : 391,622.55 = 71,525.78 : x
2. Step 2: Convert to fraction form
   261,109.73/391,622.55 = 71,525.78/x
3. Step 3: Cross multiply
   261,109.73x = 391,622.55 × 71,525.78
4. Step 4: Simplify right side
   261,109.73x = 28,011,109,799.47
5. Step 5: Solve for x
   x = 28,011,109,799.47/261,109.73
6. Step 6: Final answer
   x = 107,277.16