Finding the Fourth Proportional to 2,158,518.80, 2,978,708.58 and 1,178,424.32

Step by Step Solution

1. Step 1: Write the proportion equation
   2,158,518.80 : 2,978,708.58 = 1,178,424.32 : x
2. Step 2: Convert to fraction form
   2,158,518.80/2,978,708.58 = 1,178,424.32/x
3. Step 3: Cross multiply
   2,158,518.80x = 2,978,708.58 × 1,178,424.32
4. Step 4: Simplify right side
   2,158,518.80x = 3,510,182,632,864.67
5. Step 5: Solve for x
   x = 3,510,182,632,864.67/2,158,518.80
6. Step 6: Final answer
   x = 1,626,199.70