Finding the Third Proportional to 31,590 and 69,961.50

Step by Step Solution

1. Step 1: Write the proportion equation
   31,590 : 69,961.50 = 69,961.50 : x
2. Step 2: Convert to fraction form
   31,590/69,961.50 = 69,961.50/x
3. Step 3: Cross multiply
   31,590x = 69,961.50 × 69,961.50
4. Step 4: Simplify right side
   31,590x = 4,894,611,482.25
5. Step 5: Solve for x
   x = 4,894,611,482.25/31,590
6. Step 6: Final answer
   x = 154,941.80