Finding the Third Proportional to 619,485.50 and 872,385

Step by Step Solution

1. Step 1: Write the proportion equation
   619,485.50 : 872,385 = 872,385 : x
2. Step 2: Convert to fraction form
   619,485.50/872,385 = 872,385/x
3. Step 3: Cross multiply
   619,485.50x = 872,385 × 872,385
4. Step 4: Simplify right side
   619,485.50x = 761,055,588,225
5. Step 5: Solve for x
   x = 761,055,588,225/619,485.50
6. Step 6: Final answer
   x = 1,228,528.49