Finding the Third Proportional to 78,484 and 100,773.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,484 : 100,773.50 = 100,773.50 : x
2. Step 2: Convert to fraction form
   78,484/100,773.50 = 100,773.50/x
3. Step 3: Cross multiply
   78,484x = 100,773.50 × 100,773.50
4. Step 4: Simplify right side
   78,484x = 10,155,298,302.25
5. Step 5: Solve for x
   x = 10,155,298,302.25/78,484
6. Step 6: Final answer
   x = 129,393.23