Finding the Third Proportional to 163,111 and 252,088.50

Step by Step Solution

1. Step 1: Write the proportion equation
   163,111 : 252,088.50 = 252,088.50 : x
2. Step 2: Convert to fraction form
   163,111/252,088.50 = 252,088.50/x
3. Step 3: Cross multiply
   163,111x = 252,088.50 × 252,088.50
4. Step 4: Simplify right side
   163,111x = 63,548,611,832.25
5. Step 5: Solve for x
   x = 63,548,611,832.25/163,111
6. Step 6: Final answer
   x = 389,603.47