Finding the Third Proportional to 145,843.31 and 316,584

Step by Step Solution

1. Step 1: Write the proportion equation
   145,843.31 : 316,584 = 316,584 : x
2. Step 2: Convert to fraction form
   145,843.31/316,584 = 316,584/x
3. Step 3: Cross multiply
   145,843.31x = 316,584 × 316,584
4. Step 4: Simplify right side
   145,843.31x = 100,225,429,056
5. Step 5: Solve for x
   x = 100,225,429,056/145,843.31
6. Step 6: Final answer
   x = 687,213.06