Finding the Fourth Proportional to 1,105,179.68, 1,525,060.72 and 621,648.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105,179.68 : 1,525,060.72 = 621,648.56 : x
2. Step 2: Convert to fraction form
   1,105,179.68/1,525,060.72 = 621,648.56/x
3. Step 3: Cross multiply
   1,105,179.68x = 1,525,060.72 × 621,648.56
4. Step 4: Simplify right side
   1,105,179.68x = 948,051,800,500.56
5. Step 5: Solve for x
   x = 948,051,800,500.56/1,105,179.68
6. Step 6: Final answer
   x = 857,825.94