Finding the Fourth Proportional to 403,590,290.50, 556,954,595.31 and 217,951,300.72

Step by Step Solution

1. Step 1: Write the proportion equation
   403,590,290.50 : 556,954,595.31 = 217,951,300.72 : x
2. Step 2: Convert to fraction form
   403,590,290.50/556,954,595.31 = 217,951,300.72/x
3. Step 3: Cross multiply
   403,590,290.50x = 556,954,595.31 × 217,951,300.72
4. Step 4: Simplify right side
   403,590,290.50x = 121,388,978,489,795,696
5. Step 5: Solve for x
   x = 121,388,978,489,795,696/403,590,290.50
6. Step 6: Final answer
   x = 300,772,791.98