Finding the Third Proportional to 54,508,780.50 and 83,783,770.50

Step by Step Solution

1. Step 1: Write the proportion equation
   54,508,780.50 : 83,783,770.50 = 83,783,770.50 : x
2. Step 2: Convert to fraction form
   54,508,780.50/83,783,770.50 = 83,783,770.50/x
3. Step 3: Cross multiply
   54,508,780.50x = 83,783,770.50 × 83,783,770.50
4. Step 4: Simplify right side
   54,508,780.50x = 7,019,720,199,196,670
5. Step 5: Solve for x
   x = 7,019,720,199,196,670/54,508,780.50
6. Step 6: Final answer
   x = 128,781,457.50