Finding the Fourth Proportional to 42,076.56, 63,092.72 and 12,490.32

Step by Step Solution

1. Step 1: Write the proportion equation
   42,076.56 : 63,092.72 = 12,490.32 : x
2. Step 2: Convert to fraction form
   42,076.56/63,092.72 = 12,490.32/x
3. Step 3: Cross multiply
   42,076.56x = 63,092.72 × 12,490.32
4. Step 4: Simplify right side
   42,076.56x = 788,048,262.47
5. Step 5: Solve for x
   x = 788,048,262.47/42,076.56
6. Step 6: Final answer
   x = 18,728.91