Finding the Fourth Proportional to 100,081.64, 138,096.42 and 55,361

Step by Step Solution

1. Step 1: Write the proportion equation
   100,081.64 : 138,096.42 = 55,361 : x
2. Step 2: Convert to fraction form
   100,081.64/138,096.42 = 55,361/x
3. Step 3: Cross multiply
   100,081.64x = 138,096.42 × 55,361
4. Step 4: Simplify right side
   100,081.64x = 7,645,155,907.62
5. Step 5: Solve for x
   x = 7,645,155,907.62/100,081.64
6. Step 6: Final answer
   x = 76,389.19