Finding the Fourth Proportional to 161,322.38, 242,015.90 and 90,345.98

Step by Step Solution

1. Step 1: Write the proportion equation
   161,322.38 : 242,015.90 = 90,345.98 : x
2. Step 2: Convert to fraction form
   161,322.38/242,015.90 = 90,345.98/x
3. Step 3: Cross multiply
   161,322.38x = 242,015.90 × 90,345.98
4. Step 4: Simplify right side
   161,322.38x = 21,865,164,322.59
5. Step 5: Solve for x
   x = 21,865,164,322.59/161,322.38
6. Step 6: Final answer
   x = 135,537.08