Finding the Fourth Proportional to 1,404,830.39, 2,107,251.05 and 339,870.74

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404,830.39 : 2,107,251.05 = 339,870.74 : x
2. Step 2: Convert to fraction form
   1,404,830.39/2,107,251.05 = 339,870.74/x
3. Step 3: Cross multiply
   1,404,830.39x = 2,107,251.05 × 339,870.74
4. Step 4: Simplify right side
   1,404,830.39x = 716,192,961,493.67
5. Step 5: Solve for x
   x = 716,192,961,493.67/1,404,830.39
6. Step 6: Final answer
   x = 509,807.43