Finding the Fourth Proportional to 129,667.70, 194,647.35 and 100,216.10

Step by Step Solution

1. Step 1: Write the proportion equation
   129,667.70 : 194,647.35 = 100,216.10 : x
2. Step 2: Convert to fraction form
   129,667.70/194,647.35 = 100,216.10/x
3. Step 3: Cross multiply
   129,667.70x = 194,647.35 × 100,216.10
4. Step 4: Simplify right side
   129,667.70x = 19,506,798,292.34
5. Step 5: Solve for x
   x = 19,506,798,292.34/129,667.70
6. Step 6: Final answer
   x = 150,436.83