Finding the Third Proportional to 77,499.70 and 109,692.28

Step by Step Solution

1. Step 1: Write the proportion equation
   77,499.70 : 109,692.28 = 109,692.28 : x
2. Step 2: Convert to fraction form
   77,499.70/109,692.28 = 109,692.28/x
3. Step 3: Cross multiply
   77,499.70x = 109,692.28 × 109,692.28
4. Step 4: Simplify right side
   77,499.70x = 12,032,396,565.83
5. Step 5: Solve for x
   x = 12,032,396,565.83/77,499.70
6. Step 6: Final answer
   x = 155,257.32