Finding the Third Proportional to 99,706.50 and 215,068.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,706.50 : 215,068.50 = 215,068.50 : x
2. Step 2: Convert to fraction form
   99,706.50/215,068.50 = 215,068.50/x
3. Step 3: Cross multiply
   99,706.50x = 215,068.50 × 215,068.50
4. Step 4: Simplify right side
   99,706.50x = 46,254,459,692.25
5. Step 5: Solve for x
   x = 46,254,459,692.25/99,706.50
6. Step 6: Final answer
   x = 463,906.16