Finding the Fourth Proportional to 108,404.79, 162,438.62 and 75,189.75

Step by Step Solution

1. Step 1: Write the proportion equation
   108,404.79 : 162,438.62 = 75,189.75 : x
2. Step 2: Convert to fraction form
   108,404.79/162,438.62 = 75,189.75/x
3. Step 3: Cross multiply
   108,404.79x = 162,438.62 × 75,189.75
4. Step 4: Simplify right side
   108,404.79x = 12,213,718,852.20
5. Step 5: Solve for x
   x = 12,213,718,852.20/108,404.79
6. Step 6: Final answer
   x = 112,667.70