Finding the Third Proportional to 31,865.91 and 69,870.09

Step by Step Solution

1. Step 1: Write the proportion equation
   31,865.91 : 69,870.09 = 69,870.09 : x
2. Step 2: Convert to fraction form
   31,865.91/69,870.09 = 69,870.09/x
3. Step 3: Cross multiply
   31,865.91x = 69,870.09 × 69,870.09
4. Step 4: Simplify right side
   31,865.91x = 4,881,830,000.63
5. Step 5: Solve for x
   x = 4,881,830,000.63/31,865.91
6. Step 6: Final answer
   x = 153,199.16