Finding the Third Proportional to 249,428.50 and 380,370

Step by Step Solution

1. Step 1: Write the proportion equation
   249,428.50 : 380,370 = 380,370 : x
2. Step 2: Convert to fraction form
   249,428.50/380,370 = 380,370/x
3. Step 3: Cross multiply
   249,428.50x = 380,370 × 380,370
4. Step 4: Simplify right side
   249,428.50x = 144,681,336,900
5. Step 5: Solve for x
   x = 144,681,336,900/249,428.50
6. Step 6: Final answer
   x = 580,051.34