Finding the Third Proportional to 197,691 and 423,985.50

Step by Step Solution

1. Step 1: Write the proportion equation
   197,691 : 423,985.50 = 423,985.50 : x
2. Step 2: Convert to fraction form
   197,691/423,985.50 = 423,985.50/x
3. Step 3: Cross multiply
   197,691x = 423,985.50 × 423,985.50
4. Step 4: Simplify right side
   197,691x = 179,763,704,210.25
5. Step 5: Solve for x
   x = 179,763,704,210.25/197,691
6. Step 6: Final answer
   x = 909,316.58