Finding the Third Proportional to 189,499.50 and 421,038

Step by Step Solution

1. Step 1: Write the proportion equation
   189,499.50 : 421,038 = 421,038 : x
2. Step 2: Convert to fraction form
   189,499.50/421,038 = 421,038/x
3. Step 3: Cross multiply
   189,499.50x = 421,038 × 421,038
4. Step 4: Simplify right side
   189,499.50x = 177,272,997,444
5. Step 5: Solve for x
   x = 177,272,997,444/189,499.50
6. Step 6: Final answer
   x = 935,480.03