Finding the Fourth Proportional to 1,018,538.89, 1,405,576.70 and 559,658.30

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,538.89 : 1,405,576.70 = 559,658.30 : x
2. Step 2: Convert to fraction form
   1,018,538.89/1,405,576.70 = 559,658.30/x
3. Step 3: Cross multiply
   1,018,538.89x = 1,405,576.70 × 559,658.30
4. Step 4: Simplify right side
   1,018,538.89x = 786,642,658,714.15
5. Step 5: Solve for x
   x = 786,642,658,714.15/1,018,538.89
6. Step 6: Final answer
   x = 772,324.62