Finding the Fourth Proportional to 915,804, 1,263,809.52 and 513,396

Step by Step Solution

1. Step 1: Write the proportion equation
   915,804 : 1,263,809.52 = 513,396 : x
2. Step 2: Convert to fraction form
   915,804/1,263,809.52 = 513,396/x
3. Step 3: Cross multiply
   915,804x = 1,263,809.52 × 513,396
4. Step 4: Simplify right side
   915,804x = 648,834,752,329.92
5. Step 5: Solve for x
   x = 648,834,752,329.92/915,804
6. Step 6: Final answer
   x = 708,486.48