Finding the Fourth Proportional to 158,598.69, 218,865.18 and 90,636.45

Step by Step Solution

1. Step 1: Write the proportion equation
   158,598.69 : 218,865.18 = 90,636.45 : x
2. Step 2: Convert to fraction form
   158,598.69/218,865.18 = 90,636.45/x
3. Step 3: Cross multiply
   158,598.69x = 218,865.18 × 90,636.45
4. Step 4: Simplify right side
   158,598.69x = 19,837,162,943.81
5. Step 5: Solve for x
   x = 19,837,162,943.81/158,598.69
6. Step 6: Final answer
   x = 125,077.72