Finding the Fourth Proportional to 2,740,145.61, 4,111,131.23 and 918,690.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,740,145.61 : 4,111,131.23 = 918,690.78 : x
2. Step 2: Convert to fraction form
   2,740,145.61/4,111,131.23 = 918,690.78/x
3. Step 3: Cross multiply
   2,740,145.61x = 4,111,131.23 × 918,690.78
4. Step 4: Simplify right side
   2,740,145.61x = 3,776,858,368,871.04
5. Step 5: Solve for x
   x = 3,776,858,368,871.04/2,740,145.61
6. Step 6: Final answer
   x = 1,378,342.22