Finding the Fourth Proportional to 82,120.72, 123,148.50 and 28,071.94

Step by Step Solution

1. Step 1: Write the proportion equation
   82,120.72 : 123,148.50 = 28,071.94 : x
2. Step 2: Convert to fraction form
   82,120.72/123,148.50 = 28,071.94/x
3. Step 3: Cross multiply
   82,120.72x = 123,148.50 × 28,071.94
4. Step 4: Simplify right side
   82,120.72x = 3,457,017,303.09
5. Step 5: Solve for x
   x = 3,457,017,303.09/82,120.72
6. Step 6: Final answer
   x = 42,096.77