Finding the Fourth Proportional to 10,077.76, 13,905.78 and 5,601.55

Step by Step Solution

1. Step 1: Write the proportion equation
   10,077.76 : 13,905.78 = 5,601.55 : x
2. Step 2: Convert to fraction form
   10,077.76/13,905.78 = 5,601.55/x
3. Step 3: Cross multiply
   10,077.76x = 13,905.78 × 5,601.55
4. Step 4: Simplify right side
   10,077.76x = 77,893,921.96
5. Step 5: Solve for x
   x = 77,893,921.96/10,077.76
6. Step 6: Final answer
   x = 7,729.29