Finding the Third Proportional to 105,143.63 and 231,314.63

Step by Step Solution

1. Step 1: Write the proportion equation
   105,143.63 : 231,314.63 = 231,314.63 : x
2. Step 2: Convert to fraction form
   105,143.63/231,314.63 = 231,314.63/x
3. Step 3: Cross multiply
   105,143.63x = 231,314.63 × 231,314.63
4. Step 4: Simplify right side
   105,143.63x = 53,506,455,738.89
5. Step 5: Solve for x
   x = 53,506,455,738.89/105,143.63
6. Step 6: Final answer
   x = 508,889.21