Finding the Fourth Proportional to 158,812.72, 219,118.72 and 90,815.68

Step by Step Solution

1. Step 1: Write the proportion equation
   158,812.72 : 219,118.72 = 90,815.68 : x
2. Step 2: Convert to fraction form
   158,812.72/219,118.72 = 90,815.68/x
3. Step 3: Cross multiply
   158,812.72x = 219,118.72 × 90,815.68
4. Step 4: Simplify right side
   158,812.72x = 19,899,415,557.53
5. Step 5: Solve for x
   x = 19,899,415,557.53/158,812.72
6. Step 6: Final answer
   x = 125,301.14