Finding the Third Proportional to 90,131 and 137,141

Step by Step Solution

1. Step 1: Write the proportion equation
   90,131 : 137,141 = 137,141 : x
2. Step 2: Convert to fraction form
   90,131/137,141 = 137,141/x
3. Step 3: Cross multiply
   90,131x = 137,141 × 137,141
4. Step 4: Simplify right side
   90,131x = 18,807,653,881
5. Step 5: Solve for x
   x = 18,807,653,881/90,131
6. Step 6: Final answer
   x = 208,670.20