Finding the Third Proportional to 384,886.69 and 554,419.69

Step by Step Solution

1. Step 1: Write the proportion equation
   384,886.69 : 554,419.69 = 554,419.69 : x
2. Step 2: Convert to fraction form
   384,886.69/554,419.69 = 554,419.69/x
3. Step 3: Cross multiply
   384,886.69x = 554,419.69 × 554,419.69
4. Step 4: Simplify right side
   384,886.69x = 307,381,189,887.60
5. Step 5: Solve for x
   x = 307,381,189,887.60/384,886.69
6. Step 6: Final answer
   x = 798,627.75