Finding the Third Proportional to 559,290 and 872,064

Step by Step Solution

1. Step 1: Write the proportion equation
   559,290 : 872,064 = 872,064 : x
2. Step 2: Convert to fraction form
   559,290/872,064 = 872,064/x
3. Step 3: Cross multiply
   559,290x = 872,064 × 872,064
4. Step 4: Simplify right side
   559,290x = 760,495,620,096
5. Step 5: Solve for x
   x = 760,495,620,096/559,290
6. Step 6: Final answer
   x = 1,359,751.86