Finding the Fourth Proportional to 2,612,599.20, 3,919,044.72 and 815,730.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,612,599.20 : 3,919,044.72 = 815,730.72 : x
2. Step 2: Convert to fraction form
   2,612,599.20/3,919,044.72 = 815,730.72/x
3. Step 3: Cross multiply
   2,612,599.20x = 3,919,044.72 × 815,730.72
4. Step 4: Simplify right side
   2,612,599.20x = 3,196,885,171,157.80
5. Step 5: Solve for x
   x = 3,196,885,171,157.80/2,612,599.20
6. Step 6: Final answer
   x = 1,223,641.64