Finding the Fourth Proportional to 101,412.14, 139,947.55 and 56,086.56

Step by Step Solution

1. Step 1: Write the proportion equation
   101,412.14 : 139,947.55 = 56,086.56 : x
2. Step 2: Convert to fraction form
   101,412.14/139,947.55 = 56,086.56/x
3. Step 3: Cross multiply
   101,412.14x = 139,947.55 × 56,086.56
4. Step 4: Simplify right side
   101,412.14x = 7,849,176,519.71
5. Step 5: Solve for x
   x = 7,849,176,519.71/101,412.14
6. Step 6: Final answer
   x = 77,398.79