Finding the Fourth Proportional to 778,756, 1,074,683.28 and 421,060

Step by Step Solution

1. Step 1: Write the proportion equation
   778,756 : 1,074,683.28 = 421,060 : x
2. Step 2: Convert to fraction form
   778,756/1,074,683.28 = 421,060/x
3. Step 3: Cross multiply
   778,756x = 1,074,683.28 × 421,060
4. Step 4: Simplify right side
   778,756x = 452,506,141,876.80
5. Step 5: Solve for x
   x = 452,506,141,876.80/778,756
6. Step 6: Final answer
   x = 581,062.80