Finding the Fourth Proportional to 1,228,300.33, 1,842,622.71 and 429,400.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228,300.33 : 1,842,622.71 = 429,400.15 : x
2. Step 2: Convert to fraction form
   1,228,300.33/1,842,622.71 = 429,400.15/x
3. Step 3: Cross multiply
   1,228,300.33x = 1,842,622.71 × 429,400.15
4. Step 4: Simplify right side
   1,228,300.33x = 791,222,468,067.41
5. Step 5: Solve for x
   x = 791,222,468,067.41/1,228,300.33
6. Step 6: Final answer
   x = 644,160.43