Finding the Fourth Proportional to 861,790.82, 1,188,389.28 and 571,301.34

Step by Step Solution

1. Step 1: Write the proportion equation
   861,790.82 : 1,188,389.28 = 571,301.34 : x
2. Step 2: Convert to fraction form
   861,790.82/1,188,389.28 = 571,301.34/x
3. Step 3: Cross multiply
   861,790.82x = 1,188,389.28 × 571,301.34
4. Step 4: Simplify right side
   861,790.82x = 678,928,388,105.64
5. Step 5: Solve for x
   x = 678,928,388,105.64/861,790.82
6. Step 6: Final answer
   x = 787,811.12