Finding the Third Proportional to 689,731.50 and 1,076,506.50

Step by Step Solution

1. Step 1: Write the proportion equation
   689,731.50 : 1,076,506.50 = 1,076,506.50 : x
2. Step 2: Convert to fraction form
   689,731.50/1,076,506.50 = 1,076,506.50/x
3. Step 3: Cross multiply
   689,731.50x = 1,076,506.50 × 1,076,506.50
4. Step 4: Simplify right side
   689,731.50x = 1,158,866,244,542.25
5. Step 5: Solve for x
   x = 1,158,866,244,542.25/689,731.50
6. Step 6: Final answer
   x = 1,680,170.10