Finding the Fourth Proportional to 2,158,665.60, 3,238,387.20 and 896,620.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,665.60 : 3,238,387.20 = 896,620.80 : x
2. Step 2: Convert to fraction form
   2,158,665.60/3,238,387.20 = 896,620.80/x
3. Step 3: Cross multiply
   2,158,665.60x = 3,238,387.20 × 896,620.80
4. Step 4: Simplify right side
   2,158,665.60x = 2,903,605,321,973.76
5. Step 5: Solve for x
   x = 2,903,605,321,973.76/2,158,665.60
6. Step 6: Final answer
   x = 1,345,092.69