Finding the Fourth Proportional to 152,855.48, 210,936.42 and 91,636.28

Step by Step Solution

1. Step 1: Write the proportion equation
   152,855.48 : 210,936.42 = 91,636.28 : x
2. Step 2: Convert to fraction form
   152,855.48/210,936.42 = 91,636.28/x
3. Step 3: Cross multiply
   152,855.48x = 210,936.42 × 91,636.28
4. Step 4: Simplify right side
   152,855.48x = 19,329,428,845.32
5. Step 5: Solve for x
   x = 19,329,428,845.32/152,855.48
6. Step 6: Final answer
   x = 126,455.58