Finding the Fourth Proportional to 2,578,086.16, 3,557,638.20 and 1,432,236.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,578,086.16 : 3,557,638.20 = 1,432,236.40 : x
2. Step 2: Convert to fraction form
   2,578,086.16/3,557,638.20 = 1,432,236.40/x
3. Step 3: Cross multiply
   2,578,086.16x = 3,557,638.20 × 1,432,236.40
4. Step 4: Simplify right side
   2,578,086.16x = 5,095,378,928,070.48
5. Step 5: Solve for x
   x = 5,095,378,928,070.48/2,578,086.16
6. Step 6: Final answer
   x = 1,976,419.18