Finding the Fourth Proportional to 259,781,146.78, 358,498,049.89 and 142,310,653.10

Step by Step Solution

1. Step 1: Write the proportion equation
   259,781,146.78 : 358,498,049.89 = 142,310,653.10 : x
2. Step 2: Convert to fraction form
   259,781,146.78/358,498,049.89 = 142,310,653.10/x
3. Step 3: Cross multiply
   259,781,146.78x = 358,498,049.89 × 142,310,653.10
4. Step 4: Simplify right side
   259,781,146.78x = 51,018,091,614,922,280
5. Step 5: Solve for x
   x = 51,018,091,614,922,280/259,781,146.78
6. Step 6: Final answer
   x = 196,388,738.17