Finding the Third Proportional to 148,447.69 and 319,858.88

Step by Step Solution

1. Step 1: Write the proportion equation
   148,447.69 : 319,858.88 = 319,858.88 : x
2. Step 2: Convert to fraction form
   148,447.69/319,858.88 = 319,858.88/x
3. Step 3: Cross multiply
   148,447.69x = 319,858.88 × 319,858.88
4. Step 4: Simplify right side
   148,447.69x = 102,309,699,916.27
5. Step 5: Solve for x
   x = 102,309,699,916.27/148,447.69
6. Step 6: Final answer
   x = 689,196.99