Finding the Third Proportional to 219,216 and 297,070.50

Step by Step Solution

1. Step 1: Write the proportion equation
   219,216 : 297,070.50 = 297,070.50 : x
2. Step 2: Convert to fraction form
   219,216/297,070.50 = 297,070.50/x
3. Step 3: Cross multiply
   219,216x = 297,070.50 × 297,070.50
4. Step 4: Simplify right side
   219,216x = 88,250,881,970.25
5. Step 5: Solve for x
   x = 88,250,881,970.25/219,216
6. Step 6: Final answer
   x = 402,575.00