Finding the Fourth Proportional to 136,969.72, 189,037.02 and 78,825.27

Step by Step Solution

1. Step 1: Write the proportion equation
   136,969.72 : 189,037.02 = 78,825.27 : x
2. Step 2: Convert to fraction form
   136,969.72/189,037.02 = 78,825.27/x
3. Step 3: Cross multiply
   136,969.72x = 189,037.02 × 78,825.27
4. Step 4: Simplify right side
   136,969.72x = 14,900,894,141.50
5. Step 5: Solve for x
   x = 14,900,894,141.50/136,969.72
6. Step 6: Final answer
   x = 108,789.70