Finding the Fourth Proportional to 220,619,786.85, 330,499,162.71 and 171,869,375.25

Step by Step Solution

1. Step 1: Write the proportion equation
   220,619,786.85 : 330,499,162.71 = 171,869,375.25 : x
2. Step 2: Convert to fraction form
   220,619,786.85/330,499,162.71 = 171,869,375.25/x
3. Step 3: Cross multiply
   220,619,786.85x = 330,499,162.71 × 171,869,375.25
4. Step 4: Simplify right side
   220,619,786.85x = 56,802,684,615,615,792
5. Step 5: Solve for x
   x = 56,802,684,615,615,792/220,619,786.85
6. Step 6: Final answer
   x = 257,468,676.89