Finding the Third Proportional to 561,090 and 847,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   561,090 : 847,528.50 = 847,528.50 : x
2. Step 2: Convert to fraction form
   561,090/847,528.50 = 847,528.50/x
3. Step 3: Cross multiply
   561,090x = 847,528.50 × 847,528.50
4. Step 4: Simplify right side
   561,090x = 718,304,558,312.25
5. Step 5: Solve for x
   x = 718,304,558,312.25/561,090
6. Step 6: Final answer
   x = 1,280,194.90