Finding the Fourth Proportional to 404,756,061.78, 558,563,552.42 and 219,117,077.68

Step by Step Solution

1. Step 1: Write the proportion equation
   404,756,061.78 : 558,563,552.42 = 219,117,077.68 : x
2. Step 2: Convert to fraction form
   404,756,061.78/558,563,552.42 = 219,117,077.68/x
3. Step 3: Cross multiply
   404,756,061.78x = 558,563,552.42 × 219,117,077.68
4. Step 4: Simplify right side
   404,756,061.78x = 122,390,813,304,829,888
5. Step 5: Solve for x
   x = 122,390,813,304,829,888/404,756,061.78
6. Step 6: Final answer
   x = 302,381,668.52