Finding the Third Proportional to 191,992.78 and 418,434.61

Step by Step Solution

1. Step 1: Write the proportion equation
   191,992.78 : 418,434.61 = 418,434.61 : x
2. Step 2: Convert to fraction form
   191,992.78/418,434.61 = 418,434.61/x
3. Step 3: Cross multiply
   191,992.78x = 418,434.61 × 418,434.61
4. Step 4: Simplify right side
   191,992.78x = 175,087,522,322.81
5. Step 5: Solve for x
   x = 175,087,522,322.81/191,992.78
6. Step 6: Final answer
   x = 911,948.47