Finding the Fourth Proportional to 102,068.28, 140,856.30 and 56,748.06

Step by Step Solution

1. Step 1: Write the proportion equation
   102,068.28 : 140,856.30 = 56,748.06 : x
2. Step 2: Convert to fraction form
   102,068.28/140,856.30 = 56,748.06/x
3. Step 3: Cross multiply
   102,068.28x = 140,856.30 × 56,748.06
4. Step 4: Simplify right side
   102,068.28x = 7,993,321,763.78
5. Step 5: Solve for x
   x = 7,993,321,763.78/102,068.28
6. Step 6: Final answer
   x = 78,313.48