Finding the Fourth Proportional to 1,105,138.27, 1,524,967.14 and 621,693.37

Step by Step Solution

1. Step 1: Write the proportion equation
   1,105,138.27 : 1,524,967.14 = 621,693.37 : x
2. Step 2: Convert to fraction form
   1,105,138.27/1,524,967.14 = 621,693.37/x
3. Step 3: Cross multiply
   1,105,138.27x = 1,524,967.14 × 621,693.37
4. Step 4: Simplify right side
   1,105,138.27x = 948,061,960,405.86
5. Step 5: Solve for x
   x = 948,061,960,405.86/1,105,138.27
6. Step 6: Final answer
   x = 857,867.28