Finding the Fourth Proportional to 92,890.72, 128,189.42 and 50,448.34

Step by Step Solution

1. Step 1: Write the proportion equation
   92,890.72 : 128,189.42 = 50,448.34 : x
2. Step 2: Convert to fraction form
   92,890.72/128,189.42 = 50,448.34/x
3. Step 3: Cross multiply
   92,890.72x = 128,189.42 × 50,448.34
4. Step 4: Simplify right side
   92,890.72x = 6,466,943,444.56
5. Step 5: Solve for x
   x = 6,466,943,444.56/92,890.72
6. Step 6: Final answer
   x = 69,618.83