Finding the Third Proportional to 266,054 and 391,300

Step by Step Solution

1. Step 1: Write the proportion equation
   266,054 : 391,300 = 391,300 : x
2. Step 2: Convert to fraction form
   266,054/391,300 = 391,300/x
3. Step 3: Cross multiply
   266,054x = 391,300 × 391,300
4. Step 4: Simplify right side
   266,054x = 153,115,690,000
5. Step 5: Solve for x
   x = 153,115,690,000/266,054
6. Step 6: Final answer
   x = 575,506.06