Finding the Fourth Proportional to 49,910.49, 74,931.34 and 45,784.35

Step by Step Solution

1. Step 1: Write the proportion equation
   49,910.49 : 74,931.34 = 45,784.35 : x
2. Step 2: Convert to fraction form
   49,910.49/74,931.34 = 45,784.35/x
3. Step 3: Cross multiply
   49,910.49x = 74,931.34 × 45,784.35
4. Step 4: Simplify right side
   49,910.49x = 3,430,682,696.53
5. Step 5: Solve for x
   x = 3,430,682,696.53/49,910.49
6. Step 6: Final answer
   x = 68,736.71