Finding the Fourth Proportional to 189,290.42, 283,852.50 and 70,878.72

Step by Step Solution

1. Step 1: Write the proportion equation
   189,290.42 : 283,852.50 = 70,878.72 : x
2. Step 2: Convert to fraction form
   189,290.42/283,852.50 = 70,878.72/x
3. Step 3: Cross multiply
   189,290.42x = 283,852.50 × 70,878.72
4. Step 4: Simplify right side
   189,290.42x = 20,119,101,868.80
5. Step 5: Solve for x
   x = 20,119,101,868.80/189,290.42
6. Step 6: Final answer
   x = 106,286.95