Finding the Fourth Proportional to 261,173.04, 391,870.25 and 142,705.99

Step by Step Solution

1. Step 1: Write the proportion equation
   261,173.04 : 391,870.25 = 142,705.99 : x
2. Step 2: Convert to fraction form
   261,173.04/391,870.25 = 142,705.99/x
3. Step 3: Cross multiply
   261,173.04x = 391,870.25 × 142,705.99
4. Step 4: Simplify right side
   261,173.04x = 55,922,231,354.89
5. Step 5: Solve for x
   x = 55,922,231,354.89/261,173.04
6. Step 6: Final answer
   x = 214,119.46