Finding the Fourth Proportional to 85,384.56, 128,080.50 and 26,222.58

Step by Step Solution

1. Step 1: Write the proportion equation
   85,384.56 : 128,080.50 = 26,222.58 : x
2. Step 2: Convert to fraction form
   85,384.56/128,080.50 = 26,222.58/x
3. Step 3: Cross multiply
   85,384.56x = 128,080.50 × 26,222.58
4. Step 4: Simplify right side
   85,384.56x = 3,358,601,157.69
5. Step 5: Solve for x
   x = 3,358,601,157.69/85,384.56
6. Step 6: Final answer
   x = 39,334.99