Finding the Fourth Proportional to 175,019.30, 262,356.15 and 86,200.10

Step by Step Solution

1. Step 1: Write the proportion equation
   175,019.30 : 262,356.15 = 86,200.10 : x
2. Step 2: Convert to fraction form
   175,019.30/262,356.15 = 86,200.10/x
3. Step 3: Cross multiply
   175,019.30x = 262,356.15 × 86,200.10
4. Step 4: Simplify right side
   175,019.30x = 22,615,126,365.62
5. Step 5: Solve for x
   x = 22,615,126,365.62/175,019.30
6. Step 6: Final answer
   x = 129,215.04