Finding the Third Proportional to 615,213 and 963,139.50

Step by Step Solution

1. Step 1: Write the proportion equation
   615,213 : 963,139.50 = 963,139.50 : x
2. Step 2: Convert to fraction form
   615,213/963,139.50 = 963,139.50/x
3. Step 3: Cross multiply
   615,213x = 963,139.50 × 963,139.50
4. Step 4: Simplify right side
   615,213x = 927,637,696,460.25
5. Step 5: Solve for x
   x = 927,637,696,460.25/615,213
6. Step 6: Final answer
   x = 1,507,831.75