Finding the Fourth Proportional to 80,693,686.69, 111,357,313.55 and 51,720,310.69

Step by Step Solution

1. Step 1: Write the proportion equation
   80,693,686.69 : 111,357,313.55 = 51,720,310.69 : x
2. Step 2: Convert to fraction form
   80,693,686.69/111,357,313.55 = 51,720,310.69/x
3. Step 3: Cross multiply
   80,693,686.69x = 111,357,313.55 × 51,720,310.69
4. Step 4: Simplify right side
   80,693,686.69x = 5,759,434,854,066,703
5. Step 5: Solve for x
   x = 5,759,434,854,066,703/80,693,686.69
6. Step 6: Final answer
   x = 71,374,045.36