Finding the Fourth Proportional to 123,128.39, 183,802.22 and 108,181.61

Step by Step Solution

1. Step 1: Write the proportion equation
   123,128.39 : 183,802.22 = 108,181.61 : x
2. Step 2: Convert to fraction form
   123,128.39/183,802.22 = 108,181.61/x
3. Step 3: Cross multiply
   123,128.39x = 183,802.22 × 108,181.61
4. Step 4: Simplify right side
   123,128.39x = 19,884,020,081.17
5. Step 5: Solve for x
   x = 19,884,020,081.17/123,128.39
6. Step 6: Final answer
   x = 161,490.13