Finding the Fourth Proportional to 418,845,667.86, 577,999,969.83 and 230,691,483.18

Step by Step Solution

1. Step 1: Write the proportion equation
   418,845,667.86 : 577,999,969.83 = 230,691,483.18 : x
2. Step 2: Convert to fraction form
   418,845,667.86/577,999,969.83 = 230,691,483.18/x
3. Step 3: Cross multiply
   418,845,667.86x = 577,999,969.83 × 230,691,483.18
4. Step 4: Simplify right side
   418,845,667.86x = 133,339,670,318,077,968
5. Step 5: Solve for x
   x = 133,339,670,318,077,968/418,845,667.86
6. Step 6: Final answer
   x = 318,350,362.79