Finding the Fourth Proportional to 1,277,443.43, 1,915,393.32 and 509,059.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,277,443.43 : 1,915,393.32 = 509,059.33 : x
2. Step 2: Convert to fraction form
   1,277,443.43/1,915,393.32 = 509,059.33/x
3. Step 3: Cross multiply
   1,277,443.43x = 1,915,393.32 × 509,059.33
4. Step 4: Simplify right side
   1,277,443.43x = 975,048,830,588.71
5. Step 5: Solve for x
   x = 975,048,830,588.71/1,277,443.43
6. Step 6: Final answer
   x = 763,281.42