Finding the Fourth Proportional to 76,791.40, 105,949.98 and 49,973.32

Step by Step Solution

1. Step 1: Write the proportion equation
   76,791.40 : 105,949.98 = 49,973.32 : x
2. Step 2: Convert to fraction form
   76,791.40/105,949.98 = 49,973.32/x
3. Step 3: Cross multiply
   76,791.40x = 105,949.98 × 49,973.32
4. Step 4: Simplify right side
   76,791.40x = 5,294,672,254.53
5. Step 5: Solve for x
   x = 5,294,672,254.53/76,791.40
6. Step 6: Final answer
   x = 68,948.77