Finding the Third Proportional to 118,372.50 and 256,986

Step by Step Solution

1. Step 1: Write the proportion equation
   118,372.50 : 256,986 = 256,986 : x
2. Step 2: Convert to fraction form
   118,372.50/256,986 = 256,986/x
3. Step 3: Cross multiply
   118,372.50x = 256,986 × 256,986
4. Step 4: Simplify right side
   118,372.50x = 66,041,804,196
5. Step 5: Solve for x
   x = 66,041,804,196/118,372.50
6. Step 6: Final answer
   x = 557,915.09