Finding the Third Proportional to 266,153 and 423,271.50

Step by Step Solution

1. Step 1: Write the proportion equation
   266,153 : 423,271.50 = 423,271.50 : x
2. Step 2: Convert to fraction form
   266,153/423,271.50 = 423,271.50/x
3. Step 3: Cross multiply
   266,153x = 423,271.50 × 423,271.50
4. Step 4: Simplify right side
   266,153x = 179,158,762,712.25
5. Step 5: Solve for x
   x = 179,158,762,712.25/266,153
6. Step 6: Final answer
   x = 673,142.00