Finding the Fourth Proportional to 1,139,211.16, 1,571,883.82 and 629,815

Step by Step Solution

1. Step 1: Write the proportion equation
   1,139,211.16 : 1,571,883.82 = 629,815 : x
2. Step 2: Convert to fraction form
   1,139,211.16/1,571,883.82 = 629,815/x
3. Step 3: Cross multiply
   1,139,211.16x = 1,571,883.82 × 629,815
4. Step 4: Simplify right side
   1,139,211.16x = 989,996,008,093.30
5. Step 5: Solve for x
   x = 989,996,008,093.30/1,139,211.16
6. Step 6: Final answer
   x = 869,018.88