Finding the Fourth Proportional to 881,100.72, 1,216,114.56 and 499,338

Step by Step Solution

1. Step 1: Write the proportion equation
   881,100.72 : 1,216,114.56 = 499,338 : x
2. Step 2: Convert to fraction form
   881,100.72/1,216,114.56 = 499,338/x
3. Step 3: Cross multiply
   881,100.72x = 1,216,114.56 × 499,338
4. Step 4: Simplify right side
   881,100.72x = 607,252,212,161.28
5. Step 5: Solve for x
   x = 607,252,212,161.28/881,100.72
6. Step 6: Final answer
   x = 689,197.27