Finding the Fourth Proportional to 93,171.12, 128,555.08 and 78,124.56

Step by Step Solution

1. Step 1: Write the proportion equation
   93,171.12 : 128,555.08 = 78,124.56 : x
2. Step 2: Convert to fraction form
   93,171.12/128,555.08 = 78,124.56/x
3. Step 3: Cross multiply
   93,171.12x = 128,555.08 × 78,124.56
4. Step 4: Simplify right side
   93,171.12x = 10,043,309,060.76
5. Step 5: Solve for x
   x = 10,043,309,060.76/93,171.12
6. Step 6: Final answer
   x = 107,794.23