Finding the Fourth Proportional to 780,516, 1,077,118.56 and 422,820

Step by Step Solution

1. Step 1: Write the proportion equation
   780,516 : 1,077,118.56 = 422,820 : x
2. Step 2: Convert to fraction form
   780,516/1,077,118.56 = 422,820/x
3. Step 3: Cross multiply
   780,516x = 1,077,118.56 × 422,820
4. Step 4: Simplify right side
   780,516x = 455,427,269,539.20
5. Step 5: Solve for x
   x = 455,427,269,539.20/780,516
6. Step 6: Final answer
   x = 583,495.11