Finding the Fourth Proportional to 389,066,942.88, 536,925,109.23 and 212,850,850.37

Step by Step Solution

1. Step 1: Write the proportion equation
   389,066,942.88 : 536,925,109.23 = 212,850,850.37 : x
2. Step 2: Convert to fraction form
   389,066,942.88/536,925,109.23 = 212,850,850.37/x
3. Step 3: Cross multiply
   389,066,942.88x = 536,925,109.23 × 212,850,850.37
4. Step 4: Simplify right side
   389,066,942.88x = 114,284,966,081,926,016
5. Step 5: Solve for x
   x = 114,284,966,081,926,016/389,066,942.88
6. Step 6: Final answer
   x = 293,741,136.77