Finding the Third Proportional to 99,643 and 148,045.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,643 : 148,045.50 = 148,045.50 : x
2. Step 2: Convert to fraction form
   99,643/148,045.50 = 148,045.50/x
3. Step 3: Cross multiply
   99,643x = 148,045.50 × 148,045.50
4. Step 4: Simplify right side
   99,643x = 21,917,470,070.25
5. Step 5: Solve for x
   x = 21,917,470,070.25/99,643
6. Step 6: Final answer
   x = 219,959.96