Finding the Fourth Proportional to 137,253.69, 189,418.50 and 76,828.10

Step by Step Solution

1. Step 1: Write the proportion equation
   137,253.69 : 189,418.50 = 76,828.10 : x
2. Step 2: Convert to fraction form
   137,253.69/189,418.50 = 76,828.10/x
3. Step 3: Cross multiply
   137,253.69x = 189,418.50 × 76,828.10
4. Step 4: Simplify right side
   137,253.69x = 14,552,662,512.76
5. Step 5: Solve for x
   x = 14,552,662,512.76/137,253.69
6. Step 6: Final answer
   x = 106,027.48