Finding the Fourth Proportional to 137,068.20, 189,152.82 and 76,638.15

Step by Step Solution

1. Step 1: Write the proportion equation
   137,068.20 : 189,152.82 = 76,638.15 : x
2. Step 2: Convert to fraction form
   137,068.20/189,152.82 = 76,638.15/x
3. Step 3: Cross multiply
   137,068.20x = 189,152.82 × 76,638.15
4. Step 4: Simplify right side
   137,068.20x = 14,496,322,192.08
5. Step 5: Solve for x
   x = 14,496,322,192.08/137,068.20
6. Step 6: Final answer
   x = 105,759.92