Finding the Fourth Proportional to 1,048,340, 1,572,510 and 300,386

Step by Step Solution

1. Step 1: Write the proportion equation
   1,048,340 : 1,572,510 = 300,386 : x
2. Step 2: Convert to fraction form
   1,048,340/1,572,510 = 300,386/x
3. Step 3: Cross multiply
   1,048,340x = 1,572,510 × 300,386
4. Step 4: Simplify right side
   1,048,340x = 472,359,988,860
5. Step 5: Solve for x
   x = 472,359,988,860/1,048,340
6. Step 6: Final answer
   x = 450,579