Finding the Fourth Proportional to 915,308.34, 1,263,628.20 and 625,355.88

Step by Step Solution

1. Step 1: Write the proportion equation
   915,308.34 : 1,263,628.20 = 625,355.88 : x
2. Step 2: Convert to fraction form
   915,308.34/1,263,628.20 = 625,355.88/x
3. Step 3: Cross multiply
   915,308.34x = 1,263,628.20 × 625,355.88
4. Step 4: Simplify right side
   915,308.34x = 790,217,325,003.82
5. Step 5: Solve for x
   x = 790,217,325,003.82/915,308.34
6. Step 6: Final answer
   x = 863,334.56