Finding the Fourth Proportional to 1,291,870.82, 1,780,933.92 and 908,708.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,291,870.82 : 1,780,933.92 = 908,708.42 : x
2. Step 2: Convert to fraction form
   1,291,870.82/1,780,933.92 = 908,708.42/x
3. Step 3: Cross multiply
   1,291,870.82x = 1,780,933.92 × 908,708.42
4. Step 4: Simplify right side
   1,291,870.82x = 1,618,349,648,567.61
5. Step 5: Solve for x
   x = 1,618,349,648,567.61/1,291,870.82
6. Step 6: Final answer
   x = 1,252,717.86