Finding the Fourth Proportional to 1,404,700.47, 2,107,051.72 and 339,743.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,404,700.47 : 2,107,051.72 = 339,743.55 : x
2. Step 2: Convert to fraction form
   1,404,700.47/2,107,051.72 = 339,743.55/x
3. Step 3: Cross multiply
   1,404,700.47x = 2,107,051.72 × 339,743.55
4. Step 4: Simplify right side
   1,404,700.47x = 715,857,231,386.41
5. Step 5: Solve for x
   x = 715,857,231,386.41/1,404,700.47
6. Step 6: Final answer
   x = 509,615.57