Finding the Fourth Proportional to 141,819.26, 212,528.37 and 78,667.25

Step by Step Solution

1. Step 1: Write the proportion equation
   141,819.26 : 212,528.37 = 78,667.25 : x
2. Step 2: Convert to fraction form
   141,819.26/212,528.37 = 78,667.25/x
3. Step 3: Cross multiply
   141,819.26x = 212,528.37 × 78,667.25
4. Step 4: Simplify right side
   141,819.26x = 16,719,022,414.88
5. Step 5: Solve for x
   x = 16,719,022,414.88/141,819.26
6. Step 6: Final answer
   x = 117,889.65