Finding the Fourth Proportional to 161,807.98, 223,302.69 and 90,188.53

Step by Step Solution

1. Step 1: Write the proportion equation
   161,807.98 : 223,302.69 = 90,188.53 : x
2. Step 2: Convert to fraction form
   161,807.98/223,302.69 = 90,188.53/x
3. Step 3: Cross multiply
   161,807.98x = 223,302.69 × 90,188.53
4. Step 4: Simplify right side
   161,807.98x = 20,139,341,356.15
5. Step 5: Solve for x
   x = 20,139,341,356.15/161,807.98
6. Step 6: Final answer
   x = 124,464.45