Finding the Fourth Proportional to 439,963,978.09, 607,140,525.39 and 239,015,659.46

Step by Step Solution

1. Step 1: Write the proportion equation
   439,963,978.09 : 607,140,525.39 = 239,015,659.46 : x
2. Step 2: Convert to fraction form
   439,963,978.09/607,140,525.39 = 239,015,659.46/x
3. Step 3: Cross multiply
   439,963,978.09x = 607,140,525.39 × 239,015,659.46
4. Step 4: Simplify right side
   439,963,978.09x = 145,116,093,061,807,488
5. Step 5: Solve for x
   x = 145,116,093,061,807,488/439,963,978.09
6. Step 6: Final answer
   x = 329,836,305.45