Finding the Fourth Proportional to 80,693,687.69, 111,357,314.93 and 51,720,311.69

Step by Step Solution

1. Step 1: Write the proportion equation
   80,693,687.69 : 111,357,314.93 = 51,720,311.69 : x
2. Step 2: Convert to fraction form
   80,693,687.69/111,357,314.93 = 51,720,311.69/x
3. Step 3: Cross multiply
   80,693,687.69x = 111,357,314.93 × 51,720,311.69
4. Step 4: Simplify right side
   80,693,687.69x = 5,759,435,037,141,091
5. Step 5: Solve for x
   x = 5,759,435,037,141,091/80,693,687.69
6. Step 6: Final answer
   x = 71,374,046.74