Finding the Fourth Proportional to 2,602,188, 3,906,864 and 1,323,660.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,602,188 : 3,906,864 = 1,323,660.76 : x
2. Step 2: Convert to fraction form
   2,602,188/3,906,864 = 1,323,660.76/x
3. Step 3: Cross multiply
   2,602,188x = 3,906,864 × 1,323,660.76
4. Step 4: Simplify right side
   2,602,188x = 5,171,362,571,456.64
5. Step 5: Solve for x
   x = 5,171,362,571,456.64/2,602,188
6. Step 6: Final answer
   x = 1,987,313.20