Finding the Fourth Proportional to 76,772.84, 105,949.80 and 42,781.37

Step by Step Solution

1. Step 1: Write the proportion equation
   76,772.84 : 105,949.80 = 42,781.37 : x
2. Step 2: Convert to fraction form
   76,772.84/105,949.80 = 42,781.37/x
3. Step 3: Cross multiply
   76,772.84x = 105,949.80 × 42,781.37
4. Step 4: Simplify right side
   76,772.84x = 4,532,677,065.48
5. Step 5: Solve for x
   x = 4,532,677,065.48/76,772.84
6. Step 6: Final answer
   x = 59,040.12