Finding the Third Proportional to 118,818 and 256,261.50

Step by Step Solution

1. Step 1: Write the proportion equation
   118,818 : 256,261.50 = 256,261.50 : x
2. Step 2: Convert to fraction form
   118,818/256,261.50 = 256,261.50/x
3. Step 3: Cross multiply
   118,818x = 256,261.50 × 256,261.50
4. Step 4: Simplify right side
   118,818x = 65,669,956,382.25
5. Step 5: Solve for x
   x = 65,669,956,382.25/118,818
6. Step 6: Final answer
   x = 552,693.67