Finding the Fourth Proportional to 189,498.62, 284,097.98 and 71,156.78

Step by Step Solution

1. Step 1: Write the proportion equation
   189,498.62 : 284,097.98 = 71,156.78 : x
2. Step 2: Convert to fraction form
   189,498.62/284,097.98 = 71,156.78/x
3. Step 3: Cross multiply
   189,498.62x = 284,097.98 × 71,156.78
4. Step 4: Simplify right side
   189,498.62x = 20,215,497,461.30
5. Step 5: Solve for x
   x = 20,215,497,461.30/189,498.62
6. Step 6: Final answer
   x = 106,678.86