Finding the Fourth Proportional to 1,018,357.31, 1,405,357.83 and 559,501.58

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,357.31 : 1,405,357.83 = 559,501.58 : x
2. Step 2: Convert to fraction form
   1,018,357.31/1,405,357.83 = 559,501.58/x
3. Step 3: Cross multiply
   1,018,357.31x = 1,405,357.83 × 559,501.58
4. Step 4: Simplify right side
   1,018,357.31x = 786,299,929,863.77
5. Step 5: Solve for x
   x = 786,299,929,863.77/1,018,357.31
6. Step 6: Final answer
   x = 772,125.78