Finding the Fourth Proportional to 42,077.06, 63,093.47 and 12,490.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42,077.06 : 63,093.47 = 12,490.82 : x
2. Step 2: Convert to fraction form
   42,077.06/63,093.47 = 12,490.82/x
3. Step 3: Cross multiply
   42,077.06x = 63,093.47 × 12,490.82
4. Step 4: Simplify right side
   42,077.06x = 788,089,176.95
5. Step 5: Solve for x
   x = 788,089,176.95/42,077.06
6. Step 6: Final answer
   x = 18,729.66