Finding the Fourth Proportional to 1,780,081.63, 2,670,196.14 and 517,909.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,780,081.63 : 2,670,196.14 = 517,909.25 : x
2. Step 2: Convert to fraction form
   1,780,081.63/2,670,196.14 = 517,909.25/x
3. Step 3: Cross multiply
   1,780,081.63x = 2,670,196.14 × 517,909.25
4. Step 4: Simplify right side
   1,780,081.63x = 1,382,919,280,220.30
5. Step 5: Solve for x
   x = 1,382,919,280,220.30/1,780,081.63
6. Step 6: Final answer
   x = 776,885.32