Finding the Fourth Proportional to 126,424.82, 189,573.74 and 42,155.15

Step by Step Solution

1. Step 1: Write the proportion equation
   126,424.82 : 189,573.74 = 42,155.15 : x
2. Step 2: Convert to fraction form
   126,424.82/189,573.74 = 42,155.15/x
3. Step 3: Cross multiply
   126,424.82x = 189,573.74 × 42,155.15
4. Step 4: Simplify right side
   126,424.82x = 7,991,509,445.76
5. Step 5: Solve for x
   x = 7,991,509,445.76/126,424.82
6. Step 6: Final answer
   x = 63,211.55