Finding the Fourth Proportional to 55,061.14, 75,986.18 and 31,187.30

Step by Step Solution

1. Step 1: Write the proportion equation
   55,061.14 : 75,986.18 = 31,187.30 : x
2. Step 2: Convert to fraction form
   55,061.14/75,986.18 = 31,187.30/x
3. Step 3: Cross multiply
   55,061.14x = 75,986.18 × 31,187.30
4. Step 4: Simplify right side
   55,061.14x = 2,369,803,791.51
5. Step 5: Solve for x
   x = 2,369,803,791.51/55,061.14
6. Step 6: Final answer
   x = 43,039.50