Finding the Fourth Proportional to 90,748.56, 125,235.72 and 54,945.12

Step by Step Solution

1. Step 1: Write the proportion equation
   90,748.56 : 125,235.72 = 54,945.12 : x
2. Step 2: Convert to fraction form
   90,748.56/125,235.72 = 54,945.12/x
3. Step 3: Cross multiply
   90,748.56x = 125,235.72 × 54,945.12
4. Step 4: Simplify right side
   90,748.56x = 6,881,091,663.69
5. Step 5: Solve for x
   x = 6,881,091,663.69/90,748.56
6. Step 6: Final answer
   x = 75,825.90