Finding the Third Proportional to 117,142 and 253,818

Step by Step Solution

1. Step 1: Write the proportion equation
   117,142 : 253,818 = 253,818 : x
2. Step 2: Convert to fraction form
   117,142/253,818 = 253,818/x
3. Step 3: Cross multiply
   117,142x = 253,818 × 253,818
4. Step 4: Simplify right side
   117,142x = 64,423,577,124
5. Step 5: Solve for x
   x = 64,423,577,124/117,142
6. Step 6: Final answer
   x = 549,961.39