Finding the Fourth Proportional to 257,325,544.17, 355,111,993.89 and 139,850,882.91

Step by Step Solution

1. Step 1: Write the proportion equation
   257,325,544.17 : 355,111,993.89 = 139,850,882.91 : x
2. Step 2: Convert to fraction form
   257,325,544.17/355,111,993.89 = 139,850,882.91/x
3. Step 3: Cross multiply
   257,325,544.17x = 355,111,993.89 × 139,850,882.91
4. Step 4: Simplify right side
   257,325,544.17x = 49,662,725,877,447,024
5. Step 5: Solve for x
   x = 49,662,725,877,447,024/257,325,544.17
6. Step 6: Final answer
   x = 192,995,709.14