Finding the Fourth Proportional to 1,018,729.98, 1,405,855.71 and 636,978.06

Step by Step Solution

1. Step 1: Write the proportion equation
   1,018,729.98 : 1,405,855.71 = 636,978.06 : x
2. Step 2: Convert to fraction form
   1,018,729.98/1,405,855.71 = 636,978.06/x
3. Step 3: Cross multiply
   1,018,729.98x = 1,405,855.71 × 636,978.06
4. Step 4: Simplify right side
   1,018,729.98x = 895,499,242,795.72
5. Step 5: Solve for x
   x = 895,499,242,795.72/1,018,729.98
6. Step 6: Final answer
   x = 879,034.94