Finding the Fourth Proportional to 692,667.55, 1,036,638.15 and 580,474.45

Step by Step Solution

1. Step 1: Write the proportion equation
   692,667.55 : 1,036,638.15 = 580,474.45 : x
2. Step 2: Convert to fraction form
   692,667.55/1,036,638.15 = 580,474.45/x
3. Step 3: Cross multiply
   692,667.55x = 1,036,638.15 × 580,474.45
4. Step 4: Simplify right side
   692,667.55x = 601,741,959,970.27
5. Step 5: Solve for x
   x = 601,741,959,970.27/692,667.55
6. Step 6: Final answer
   x = 868,731.27