Finding the Third Proportional to 780,207 and 1,059,718.50

Step by Step Solution

1. Step 1: Write the proportion equation
   780,207 : 1,059,718.50 = 1,059,718.50 : x
2. Step 2: Convert to fraction form
   780,207/1,059,718.50 = 1,059,718.50/x
3. Step 3: Cross multiply
   780,207x = 1,059,718.50 × 1,059,718.50
4. Step 4: Simplify right side
   780,207x = 1,123,003,299,242.25
5. Step 5: Solve for x
   x = 1,123,003,299,242.25/780,207
6. Step 6: Final answer
   x = 1,439,365.83