Finding the Fourth Proportional to 988,815.89, 1,364,594.72 and 559,086.80

Step by Step Solution

1. Step 1: Write the proportion equation
   988,815.89 : 1,364,594.72 = 559,086.80 : x
2. Step 2: Convert to fraction form
   988,815.89/1,364,594.72 = 559,086.80/x
3. Step 3: Cross multiply
   988,815.89x = 1,364,594.72 × 559,086.80
4. Step 4: Simplify right side
   988,815.89x = 762,926,889,876.44
5. Step 5: Solve for x
   x = 762,926,889,876.44/988,815.89
6. Step 6: Final answer
   x = 771,556.06