Finding the Fourth Proportional to 414,080,499.30, 620,593,244.55 and 220,084,851.30

Step by Step Solution

1. Step 1: Write the proportion equation
   414,080,499.30 : 620,593,244.55 = 220,084,851.30 : x
2. Step 2: Convert to fraction form
   414,080,499.30/620,593,244.55 = 220,084,851.30/x
3. Step 3: Cross multiply
   414,080,499.30x = 620,593,244.55 × 220,084,851.30
4. Step 4: Simplify right side
   414,080,499.30x = 136,583,171,944,571,280
5. Step 5: Solve for x
   x = 136,583,171,944,571,280/414,080,499.30
6. Step 6: Final answer
   x = 329,846,907.00