Finding the Fourth Proportional to 49,617.86, 74,349 and 42,191.78

Step by Step Solution

1. Step 1: Write the proportion equation
   49,617.86 : 74,349 = 42,191.78 : x
2. Step 2: Convert to fraction form
   49,617.86/74,349 = 42,191.78/x
3. Step 3: Cross multiply
   49,617.86x = 74,349 × 42,191.78
4. Step 4: Simplify right side
   49,617.86x = 3,136,916,651.22
5. Step 5: Solve for x
   x = 3,136,916,651.22/49,617.86
6. Step 6: Final answer
   x = 63,221.52