Finding the Fourth Proportional to 2,185,915.82, 3,278,912.00 and 838,155.20

Step by Step Solution

1. Step 1: Write the proportion equation
   2,185,915.82 : 3,278,912.00 = 838,155.20 : x
2. Step 2: Convert to fraction form
   2,185,915.82/3,278,912.00 = 838,155.20/x
3. Step 3: Cross multiply
   2,185,915.82x = 3,278,912.00 × 838,155.20
4. Step 4: Simplify right side
   2,185,915.82x = 2,748,237,122,557.06
5. Step 5: Solve for x
   x = 2,748,237,122,557.06/2,185,915.82
6. Step 6: Final answer
   x = 1,257,247.47