Finding the Fourth Proportional to 89,695, 123,779.13 and 51,991.12

Step by Step Solution

1. Step 1: Write the proportion equation
   89,695 : 123,779.13 = 51,991.12 : x
2. Step 2: Convert to fraction form
   89,695/123,779.13 = 51,991.12/x
3. Step 3: Cross multiply
   89,695x = 123,779.13 × 51,991.12
4. Step 4: Simplify right side
   89,695x = 6,435,415,601.33
5. Step 5: Solve for x
   x = 6,435,415,601.33/89,695
6. Step 6: Final answer
   x = 71,747.76