Finding the Fourth Proportional to 2,109,728.64, 2,911,365.44 and 1,238,549.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,109,728.64 : 2,911,365.44 = 1,238,549.60 : x
2. Step 2: Convert to fraction form
   2,109,728.64/2,911,365.44 = 1,238,549.60/x
3. Step 3: Cross multiply
   2,109,728.64x = 2,911,365.44 × 1,238,549.60
4. Step 4: Simplify right side
   2,109,728.64x = 3,605,870,501,165.82
5. Step 5: Solve for x
   x = 3,605,870,501,165.82/2,109,728.64
6. Step 6: Final answer
   x = 1,709,163.18