Finding the Fourth Proportional to 49,764.71, 74,721.93 and 42,820.38

Step by Step Solution

1. Step 1: Write the proportion equation
   49,764.71 : 74,721.93 = 42,820.38 : x
2. Step 2: Convert to fraction form
   49,764.71/74,721.93 = 42,820.38/x
3. Step 3: Cross multiply
   49,764.71x = 74,721.93 × 42,820.38
4. Step 4: Simplify right side
   49,764.71x = 3,199,621,436.93
5. Step 5: Solve for x
   x = 3,199,621,436.93/49,764.71
6. Step 6: Final answer
   x = 64,294.99