Finding the Fourth Proportional to 921,667.92, 1,271,853 and 519,234

Step by Step Solution

1. Step 1: Write the proportion equation
   921,667.92 : 1,271,853 = 519,234 : x
2. Step 2: Convert to fraction form
   921,667.92/1,271,853 = 519,234/x
3. Step 3: Cross multiply
   921,667.92x = 1,271,853 × 519,234
4. Step 4: Simplify right side
   921,667.92x = 660,389,320,602
5. Step 5: Solve for x
   x = 660,389,320,602/921,667.92
6. Step 6: Final answer
   x = 716,515.47