Finding the Fourth Proportional to 257,325,607.87, 355,112,081.54 and 139,850,944.27

Step by Step Solution

1. Step 1: Write the proportion equation
   257,325,607.87 : 355,112,081.54 = 139,850,944.27 : x
2. Step 2: Convert to fraction form
   257,325,607.87/355,112,081.54 = 139,850,944.27/x
3. Step 3: Cross multiply
   257,325,607.87x = 355,112,081.54 × 139,850,944.27
4. Step 4: Simplify right side
   257,325,607.87x = 49,662,759,925,054,240
5. Step 5: Solve for x
   x = 49,662,759,925,054,240/257,325,607.87
6. Step 6: Final answer
   x = 192,995,793.68