Finding the Fourth Proportional to 2,118,304.88, 3,177,429.61 and 520,881.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,118,304.88 : 3,177,429.61 = 520,881.78 : x
2. Step 2: Convert to fraction form
   2,118,304.88/3,177,429.61 = 520,881.78/x
3. Step 3: Cross multiply
   2,118,304.88x = 3,177,429.61 × 520,881.78
4. Step 4: Simplify right side
   2,118,304.88x = 1,655,065,191,081.51
5. Step 5: Solve for x
   x = 1,655,065,191,081.51/2,118,304.88
6. Step 6: Final answer
   x = 781,315.86