Finding the Third Proportional to 136,621.50 and 280,047

Step by Step Solution

1. Step 1: Write the proportion equation
   136,621.50 : 280,047 = 280,047 : x
2. Step 2: Convert to fraction form
   136,621.50/280,047 = 280,047/x
3. Step 3: Cross multiply
   136,621.50x = 280,047 × 280,047
4. Step 4: Simplify right side
   136,621.50x = 78,426,322,209
5. Step 5: Solve for x
   x = 78,426,322,209/136,621.50
6. Step 6: Final answer
   x = 574,040.85