Finding the Fourth Proportional to 1,261,819.58, 1,741,410.42 and 717,978.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,261,819.58 : 1,741,410.42 = 717,978.30 : x
2. Step 2: Convert to fraction form
   1,261,819.58/1,741,410.42 = 717,978.30/x
3. Step 3: Cross multiply
   1,261,819.58x = 1,741,410.42 × 717,978.30
4. Step 4: Simplify right side
   1,261,819.58x = 1,250,294,892,953.89
5. Step 5: Solve for x
   x = 1,250,294,892,953.89/1,261,819.58
6. Step 6: Final answer
   x = 990,866.61