Finding the Fourth Proportional to 2,799,570.78, 4,199,432.76 and 777,820.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,799,570.78 : 4,199,432.76 = 777,820.50 : x
2. Step 2: Convert to fraction form
   2,799,570.78/4,199,432.76 = 777,820.50/x
3. Step 3: Cross multiply
   2,799,570.78x = 4,199,432.76 × 777,820.50
4. Step 4: Simplify right side
   2,799,570.78x = 3,266,404,889,099.58
5. Step 5: Solve for x
   x = 3,266,404,889,099.58/2,799,570.78
6. Step 6: Final answer
   x = 1,166,752.03