Finding the Fourth Proportional to 257,325,314.92, 355,111,677.72 and 139,850,651.22

Step by Step Solution

1. Step 1: Write the proportion equation
   257,325,314.92 : 355,111,677.72 = 139,850,651.22 : x
2. Step 2: Convert to fraction form
   257,325,314.92/355,111,677.72 = 139,850,651.22/x
3. Step 3: Cross multiply
   257,325,314.92x = 355,111,677.72 × 139,850,651.22
4. Step 4: Simplify right side
   257,325,314.92x = 49,662,599,384,968,768
5. Step 5: Solve for x
   x = 49,662,599,384,968,768/257,325,314.92
6. Step 6: Final answer
   x = 192,995,389.51