Finding the Third Proportional to 586,178 and 1,255,300

Step by Step Solution

1. Step 1: Write the proportion equation
   586,178 : 1,255,300 = 1,255,300 : x
2. Step 2: Convert to fraction form
   586,178/1,255,300 = 1,255,300/x
3. Step 3: Cross multiply
   586,178x = 1,255,300 × 1,255,300
4. Step 4: Simplify right side
   586,178x = 1,575,778,090,000
5. Step 5: Solve for x
   x = 1,575,778,090,000/586,178
6. Step 6: Final answer
   x = 2,688,224.55