Finding the Third Proportional to 355,222.50 and 761,109

Step by Step Solution

1. Step 1: Write the proportion equation
   355,222.50 : 761,109 = 761,109 : x
2. Step 2: Convert to fraction form
   355,222.50/761,109 = 761,109/x
3. Step 3: Cross multiply
   355,222.50x = 761,109 × 761,109
4. Step 4: Simplify right side
   355,222.50x = 579,286,909,881
5. Step 5: Solve for x
   x = 579,286,909,881/355,222.50
6. Step 6: Final answer
   x = 1,630,772.01