Finding the Fourth Proportional to 2,157,953.50, 3,237,085.77 and 828,257.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,157,953.50 : 3,237,085.77 = 828,257.50 : x
2. Step 2: Convert to fraction form
   2,157,953.50/3,237,085.77 = 828,257.50/x
3. Step 3: Cross multiply
   2,157,953.50x = 3,237,085.77 × 828,257.50
4. Step 4: Simplify right side
   2,157,953.50x = 2,681,140,567,145.78
5. Step 5: Solve for x
   x = 2,681,140,567,145.78/2,157,953.50
6. Step 6: Final answer
   x = 1,242,445.94