Finding the Third Proportional to 238,970.25 and 521,417.25

Step by Step Solution

1. Step 1: Write the proportion equation
   238,970.25 : 521,417.25 = 521,417.25 : x
2. Step 2: Convert to fraction form
   238,970.25/521,417.25 = 521,417.25/x
3. Step 3: Cross multiply
   238,970.25x = 521,417.25 × 521,417.25
4. Step 4: Simplify right side
   238,970.25x = 271,875,948,597.56
5. Step 5: Solve for x
   x = 271,875,948,597.56/238,970.25
6. Step 6: Final answer
   x = 1,137,697.89