Finding the Third Proportional to 163,901.25 and 253,131

Step by Step Solution

1. Step 1: Write the proportion equation
   163,901.25 : 253,131 = 253,131 : x
2. Step 2: Convert to fraction form
   163,901.25/253,131 = 253,131/x
3. Step 3: Cross multiply
   163,901.25x = 253,131 × 253,131
4. Step 4: Simplify right side
   163,901.25x = 64,075,303,161
5. Step 5: Solve for x
   x = 64,075,303,161/163,901.25
6. Step 6: Final answer
   x = 390,938.47