Finding the Third Proportional to 77,498.30 and 109,690.17

Step by Step Solution

1. Step 1: Write the proportion equation
   77,498.30 : 109,690.17 = 109,690.17 : x
2. Step 2: Convert to fraction form
   77,498.30/109,690.17 = 109,690.17/x
3. Step 3: Cross multiply
   77,498.30x = 109,690.17 × 109,690.17
4. Step 4: Simplify right side
   77,498.30x = 12,031,933,805.97
5. Step 5: Solve for x
   x = 12,031,933,805.97/77,498.30
6. Step 6: Final answer
   x = 155,254.17