Finding the Third Proportional to 189,658.18 and 406,303.59

Step by Step Solution

1. Step 1: Write the proportion equation
   189,658.18 : 406,303.59 = 406,303.59 : x
2. Step 2: Convert to fraction form
   189,658.18/406,303.59 = 406,303.59/x
3. Step 3: Cross multiply
   189,658.18x = 406,303.59 × 406,303.59
4. Step 4: Simplify right side
   189,658.18x = 165,082,610,294.17
5. Step 5: Solve for x
   x = 165,082,610,294.17/189,658.18
6. Step 6: Final answer
   x = 870,421.79