Finding the Fourth Proportional to 42,141.88, 63,212.79 and 12,558.96

Step by Step Solution

1. Step 1: Write the proportion equation
   42,141.88 : 63,212.79 = 12,558.96 : x
2. Step 2: Convert to fraction form
   42,141.88/63,212.79 = 12,558.96/x
3. Step 3: Cross multiply
   42,141.88x = 63,212.79 × 12,558.96
4. Step 4: Simplify right side
   42,141.88x = 793,886,901.10
5. Step 5: Solve for x
   x = 793,886,901.10/42,141.88
6. Step 6: Final answer
   x = 18,838.43