Finding the Fourth Proportional to 151,196.63, 208,651.55 and 84,128.63

Step by Step Solution

1. Step 1: Write the proportion equation
   151,196.63 : 208,651.55 = 84,128.63 : x
2. Step 2: Convert to fraction form
   151,196.63/208,651.55 = 84,128.63/x
3. Step 3: Cross multiply
   151,196.63x = 208,651.55 × 84,128.63
4. Step 4: Simplify right side
   151,196.63x = 17,553,567,584.98
5. Step 5: Solve for x
   x = 17,553,567,584.98/151,196.63
6. Step 6: Final answer
   x = 116,097.62