Finding the Fourth Proportional to 1,217,667.12, 1,826,205.24 and 507,307.60

Step by Step Solution

1. Step 1: Write the proportion equation
   1,217,667.12 : 1,826,205.24 = 507,307.60 : x
2. Step 2: Convert to fraction form
   1,217,667.12/1,826,205.24 = 507,307.60/x
3. Step 3: Cross multiply
   1,217,667.12x = 1,826,205.24 × 507,307.60
4. Step 4: Simplify right side
   1,217,667.12x = 926,447,797,411.82
5. Step 5: Solve for x
   x = 926,447,797,411.82/1,217,667.12
6. Step 6: Final answer
   x = 760,838.31