Finding the Fourth Proportional to 1,291,978.50, 1,782,912.91 and 719,018.52

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,978.50 : 1,782,912.91 = 719,018.52 : x
2. Step 2: Convert to fraction form
   1,291,978.50/1,782,912.91 = 719,018.52/x
3. Step 3: Cross multiply
   1,291,978.50x = 1,782,912.91 × 719,018.52
4. Step 4: Simplify right side
   1,291,978.50x = 1,281,947,401,837.09
5. Step 5: Solve for x
   x = 1,281,947,401,837.09/1,291,978.50
6. Step 6: Final answer
   x = 992,235.86