Finding the Fourth Proportional to 100,155.14, 138,215.72 and 54,832.37

Step by Step Solution

1. Step 1: Write the proportion equation
   100,155.14 : 138,215.72 = 54,832.37 : x
2. Step 2: Convert to fraction form
   100,155.14/138,215.72 = 54,832.37/x
3. Step 3: Cross multiply
   100,155.14x = 138,215.72 × 54,832.37
4. Step 4: Simplify right side
   100,155.14x = 7,578,694,944.86
5. Step 5: Solve for x
   x = 7,578,694,944.86/100,155.14
6. Step 6: Final answer
   x = 75,669.56