Finding the Fourth Proportional to 278,329.37, 417,715.38 and 100,887.12

Step by Step Solution

1. Step 1: Write the proportion equation
   278,329.37 : 417,715.38 = 100,887.12 : x
2. Step 2: Convert to fraction form
   278,329.37/417,715.38 = 100,887.12/x
3. Step 3: Cross multiply
   278,329.37x = 417,715.38 × 100,887.12
4. Step 4: Simplify right side
   278,329.37x = 42,142,101,667.91
5. Step 5: Solve for x
   x = 42,142,101,667.91/278,329.37
6. Step 6: Final answer
   x = 151,410.91