Finding the Fourth Proportional to 93,428.82, 128,948.49 and 55,705.50

Step by Step Solution

1. Step 1: Write the proportion equation
   93,428.82 : 128,948.49 = 55,705.50 : x
2. Step 2: Convert to fraction form
   93,428.82/128,948.49 = 55,705.50/x
3. Step 3: Cross multiply
   93,428.82x = 128,948.49 × 55,705.50
4. Step 4: Simplify right side
   93,428.82x = 7,183,140,109.70
5. Step 5: Solve for x
   x = 7,183,140,109.70/93,428.82
6. Step 6: Final answer
   x = 76,883.56