Finding the Third Proportional to 136,311 and 279,421.50

Step by Step Solution

1. Step 1: Write the proportion equation
   136,311 : 279,421.50 = 279,421.50 : x
2. Step 2: Convert to fraction form
   136,311/279,421.50 = 279,421.50/x
3. Step 3: Cross multiply
   136,311x = 279,421.50 × 279,421.50
4. Step 4: Simplify right side
   136,311x = 78,076,374,662.25
5. Step 5: Solve for x
   x = 78,076,374,662.25/136,311
6. Step 6: Final answer
   x = 572,781.17