Finding the Fourth Proportional to 137,462.15, 206,128.51 and 53,261.75

Step by Step Solution

1. Step 1: Write the proportion equation
   137,462.15 : 206,128.51 = 53,261.75 : x
2. Step 2: Convert to fraction form
   137,462.15/206,128.51 = 53,261.75/x
3. Step 3: Cross multiply
   137,462.15x = 206,128.51 × 53,261.75
4. Step 4: Simplify right side
   137,462.15x = 10,978,765,167.49
5. Step 5: Solve for x
   x = 10,978,765,167.49/137,462.15
6. Step 6: Final answer
   x = 79,867.55