Finding the Fourth Proportional to 1,939,410.86, 2,907,120.22 and 860,431.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,939,410.86 : 2,907,120.22 = 860,431.56 : x
2. Step 2: Convert to fraction form
   1,939,410.86/2,907,120.22 = 860,431.56/x
3. Step 3: Cross multiply
   1,939,410.86x = 2,907,120.22 × 860,431.56
4. Step 4: Simplify right side
   1,939,410.86x = 2,501,377,970,300.25
5. Step 5: Solve for x
   x = 2,501,377,970,300.25/1,939,410.86
6. Step 6: Final answer
   x = 1,289,761.76