Finding the Fourth Proportional to 56,238.12, 77,605.56 and 31,086

Step by Step Solution

1. Step 1: Write the proportion equation
   56,238.12 : 77,605.56 = 31,086 : x
2. Step 2: Convert to fraction form
   56,238.12/77,605.56 = 31,086/x
3. Step 3: Cross multiply
   56,238.12x = 77,605.56 × 31,086
4. Step 4: Simplify right side
   56,238.12x = 2,412,446,438.16
5. Step 5: Solve for x
   x = 2,412,446,438.16/56,238.12
6. Step 6: Final answer
   x = 42,897.00