Finding the Fourth Proportional to 76,800.05, 105,971.23 and 42,801.09

Step by Step Solution

1. Step 1: Write the proportion equation
   76,800.05 : 105,971.23 = 42,801.09 : x
2. Step 2: Convert to fraction form
   76,800.05/105,971.23 = 42,801.09/x
3. Step 3: Cross multiply
   76,800.05x = 105,971.23 × 42,801.09
4. Step 4: Simplify right side
   76,800.05x = 4,535,684,152.64
5. Step 5: Solve for x
   x = 4,535,684,152.64/76,800.05
6. Step 6: Final answer
   x = 59,058.35