Finding the Third Proportional to 291,312 and 443,047.50

Step by Step Solution

1. Step 1: Write the proportion equation
   291,312 : 443,047.50 = 443,047.50 : x
2. Step 2: Convert to fraction form
   291,312/443,047.50 = 443,047.50/x
3. Step 3: Cross multiply
   291,312x = 443,047.50 × 443,047.50
4. Step 4: Simplify right side
   291,312x = 196,291,087,256.25
5. Step 5: Solve for x
   x = 196,291,087,256.25/291,312
6. Step 6: Final answer
   x = 673,817.38