Finding the Fourth Proportional to 145,431.83, 200,731.54 and 88,890.59

Step by Step Solution

1. Step 1: Write the proportion equation
   145,431.83 : 200,731.54 = 88,890.59 : x
2. Step 2: Convert to fraction form
   145,431.83/200,731.54 = 88,890.59/x
3. Step 3: Cross multiply
   145,431.83x = 200,731.54 × 88,890.59
4. Step 4: Simplify right side
   145,431.83x = 17,843,144,240.78
5. Step 5: Solve for x
   x = 17,843,144,240.78/145,431.83
6. Step 6: Final answer
   x = 122,690.78