Finding the Fourth Proportional to 49,616.86, 74,347.50 and 42,190.78

Step by Step Solution

1. Step 1: Write the proportion equation
   49,616.86 : 74,347.50 = 42,190.78 : x
2. Step 2: Convert to fraction form
   49,616.86/74,347.50 = 42,190.78/x
3. Step 3: Cross multiply
   49,616.86x = 74,347.50 × 42,190.78
4. Step 4: Simplify right side
   49,616.86x = 3,136,779,016.05
5. Step 5: Solve for x
   x = 3,136,779,016.05/49,616.86
6. Step 6: Final answer
   x = 63,220.02