Finding the Fourth Proportional to 1,302,439.47, 1,955,448.72 and 663,172.69

Step by Step Solution

1. Step 1: Write the proportion equation
   1,302,439.47 : 1,955,448.72 = 663,172.69 : x
2. Step 2: Convert to fraction form
   1,302,439.47/1,955,448.72 = 663,172.69/x
3. Step 3: Cross multiply
   1,302,439.47x = 1,955,448.72 × 663,172.69
4. Step 4: Simplify right side
   1,302,439.47x = 1,296,800,184,483.59
5. Step 5: Solve for x
   x = 1,296,800,184,483.59/1,302,439.47
6. Step 6: Final answer
   x = 995,670.21