Finding the Third Proportional to 117,090 and 253,864.50

Step by Step Solution

1. Step 1: Write the proportion equation
   117,090 : 253,864.50 = 253,864.50 : x
2. Step 2: Convert to fraction form
   117,090/253,864.50 = 253,864.50/x
3. Step 3: Cross multiply
   117,090x = 253,864.50 × 253,864.50
4. Step 4: Simplify right side
   117,090x = 64,447,184,360.25
5. Step 5: Solve for x
   x = 64,447,184,360.25/117,090
6. Step 6: Final answer
   x = 550,407.25