Finding the Fourth Proportional to 778,747.50, 1,074,671.55 and 421,051.50

Step by Step Solution

1. Step 1: Write the proportion equation
   778,747.50 : 1,074,671.55 = 421,051.50 : x
2. Step 2: Convert to fraction form
   778,747.50/1,074,671.55 = 421,051.50/x
3. Step 3: Cross multiply
   778,747.50x = 1,074,671.55 × 421,051.50
4. Step 4: Simplify right side
   778,747.50x = 452,492,068,134.83
5. Step 5: Solve for x
   x = 452,492,068,134.83/778,747.50
6. Step 6: Final answer
   x = 581,051.07