Finding the Third Proportional to 291,273 and 393,528.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,273 : 393,528.50 = 393,528.50 : x
2. Step 2: Convert to fraction form
   291,273/393,528.50 = 393,528.50/x
3. Step 3: Cross multiply
   291,273x = 393,528.50 × 393,528.50
4. Step 4: Simplify right side
   291,273x = 154,864,680,312.25
5. Step 5: Solve for x
   x = 154,864,680,312.25/291,273
6. Step 6: Final answer
   x = 531,682.24