Finding the Fourth Proportional to 621,734,436, 932,646,443.76 and 238,781,988

Step by Step Solution

1. Step 1: Write the proportion equation
   621,734,436 : 932,646,443.76 = 238,781,988 : x
2. Step 2: Convert to fraction form
   621,734,436/932,646,443.76 = 238,781,988/x
3. Step 3: Cross multiply
   621,734,436x = 932,646,443.76 × 238,781,988
4. Step 4: Simplify right side
   621,734,436x = 222,699,171,942,143,008
5. Step 5: Solve for x
   x = 222,699,171,942,143,008/621,734,436
6. Step 6: Final answer
   x = 358,190,183.86