Finding the Fourth Proportional to 2,158,714.16, 2,978,887.68 and 1,240,724.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,714.16 : 2,978,887.68 = 1,240,724.56 : x
2. Step 2: Convert to fraction form
   2,158,714.16/2,978,887.68 = 1,240,724.56/x
3. Step 3: Cross multiply
   2,158,714.16x = 2,978,887.68 × 1,240,724.56
4. Step 4: Simplify right side
   2,158,714.16x = 3,695,979,106,057.42
5. Step 5: Solve for x
   x = 3,695,979,106,057.42/2,158,714.16
6. Step 6: Final answer
   x = 1,712,120.66