Finding the Third Proportional to 389,430.50 and 841,140

Step by Step Solution

1. Step 1: Write the proportion equation
   389,430.50 : 841,140 = 841,140 : x
2. Step 2: Convert to fraction form
   389,430.50/841,140 = 841,140/x
3. Step 3: Cross multiply
   389,430.50x = 841,140 × 841,140
4. Step 4: Simplify right side
   389,430.50x = 707,516,499,600
5. Step 5: Solve for x
   x = 707,516,499,600/389,430.50
6. Step 6: Final answer
   x = 1,816,797.86