Finding the Third Proportional to 78,729,774 and 110,820,559.50

Step by Step Solution

1. Step 1: Write the proportion equation
   78,729,774 : 110,820,559.50 = 110,820,559.50 : x
2. Step 2: Convert to fraction form
   78,729,774/110,820,559.50 = 110,820,559.50/x
3. Step 3: Cross multiply
   78,729,774x = 110,820,559.50 × 110,820,559.50
4. Step 4: Simplify right side
   78,729,774x = 12,281,196,407,893,040
5. Step 5: Solve for x
   x = 12,281,196,407,893,040/78,729,774
6. Step 6: Final answer
   x = 155,991,765.05