Finding the Fourth Proportional to 89,412.70, 123,338.22 and 55,820.38

Step by Step Solution

1. Step 1: Write the proportion equation
   89,412.70 : 123,338.22 = 55,820.38 : x
2. Step 2: Convert to fraction form
   89,412.70/123,338.22 = 55,820.38/x
3. Step 3: Cross multiply
   89,412.70x = 123,338.22 × 55,820.38
4. Step 4: Simplify right side
   89,412.70x = 6,884,786,308.92
5. Step 5: Solve for x
   x = 6,884,786,308.92/89,412.70
6. Step 6: Final answer
   x = 77,000.09