Finding the Third Proportional to 99,898.31 and 209,030.63

Step by Step Solution

1. Step 1: Write the proportion equation
   99,898.31 : 209,030.63 = 209,030.63 : x
2. Step 2: Convert to fraction form
   99,898.31/209,030.63 = 209,030.63/x
3. Step 3: Cross multiply
   99,898.31x = 209,030.63 × 209,030.63
4. Step 4: Simplify right side
   99,898.31x = 43,693,802,187.89
5. Step 5: Solve for x
   x = 43,693,802,187.89/99,898.31
6. Step 6: Final answer
   x = 437,382.79