Finding the Fourth Proportional to 261,162,570.42, 360,407,207.68 and 142,085,839.52

Step by Step Solution

1. Step 1: Write the proportion equation
   261,162,570.42 : 360,407,207.68 = 142,085,839.52 : x
2. Step 2: Convert to fraction form
   261,162,570.42/360,407,207.68 = 142,085,839.52/x
3. Step 3: Cross multiply
   261,162,570.42x = 360,407,207.68 × 142,085,839.52
4. Step 4: Simplify right side
   261,162,570.42x = 51,208,760,672,817,600
5. Step 5: Solve for x
   x = 51,208,760,672,817,600/261,162,570.42
6. Step 6: Final answer
   x = 196,080,014.80