Finding the Fourth Proportional to 261,499.32, 391,878.16 and 109,532.76

Step by Step Solution

1. Step 1: Write the proportion equation
   261,499.32 : 391,878.16 = 109,532.76 : x
2. Step 2: Convert to fraction form
   261,499.32/391,878.16 = 109,532.76/x
3. Step 3: Cross multiply
   261,499.32x = 391,878.16 × 109,532.76
4. Step 4: Simplify right side
   261,499.32x = 42,923,496,448.52
5. Step 5: Solve for x
   x = 42,923,496,448.52/261,499.32
6. Step 6: Final answer
   x = 164,143.82