Finding the Third Proportional to 615,270 and 931,405.50

Step by Step Solution

1. Step 1: Write the proportion equation
   615,270 : 931,405.50 = 931,405.50 : x
2. Step 2: Convert to fraction form
   615,270/931,405.50 = 931,405.50/x
3. Step 3: Cross multiply
   615,270x = 931,405.50 × 931,405.50
4. Step 4: Simplify right side
   615,270x = 867,516,205,430.25
5. Step 5: Solve for x
   x = 867,516,205,430.25/615,270
6. Step 6: Final answer
   x = 1,409,976.44