Finding the Fourth Proportional to 820,426,333.41, 1,230,835,279.50 and 267,729,790.09

Step by Step Solution

1. Step 1: Write the proportion equation
   820,426,333.41 : 1,230,835,279.50 = 267,729,790.09 : x
2. Step 2: Convert to fraction form
   820,426,333.41/1,230,835,279.50 = 267,729,790.09/x
3. Step 3: Cross multiply
   820,426,333.41x = 1,230,835,279.50 × 267,729,790.09
4. Step 4: Simplify right side
   820,426,333.41x = 329,531,271,015,901,504
5. Step 5: Solve for x
   x = 329,531,271,015,901,504/820,426,333.41
6. Step 6: Final answer
   x = 401,658,573.84