Finding the Fourth Proportional to 144,059.94, 216,154.71 and 91,455.30

Step by Step Solution

1. Step 1: Write the proportion equation
   144,059.94 : 216,154.71 = 91,455.30 : x
2. Step 2: Convert to fraction form
   144,059.94/216,154.71 = 91,455.30/x
3. Step 3: Cross multiply
   144,059.94x = 216,154.71 × 91,455.30
4. Step 4: Simplify right side
   144,059.94x = 19,768,493,849.46
5. Step 5: Solve for x
   x = 19,768,493,849.46/144,059.94
6. Step 6: Final answer
   x = 137,224.09