Finding the Fourth Proportional to 2,105,280, 2,905,109.82 and 1,245,689.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,105,280 : 2,905,109.82 = 1,245,689.64 : x
2. Step 2: Convert to fraction form
   2,105,280/2,905,109.82 = 1,245,689.64/x
3. Step 3: Cross multiply
   2,105,280x = 2,905,109.82 × 1,245,689.64
4. Step 4: Simplify right side
   2,105,280x = 3,618,865,205,836.26
5. Step 5: Solve for x
   x = 3,618,865,205,836.26/2,105,280
6. Step 6: Final answer
   x = 1,718,947.22