Finding the Fourth Proportional to 76,411, 105,448.62 and 42,876.28

Step by Step Solution

1. Step 1: Write the proportion equation
   76,411 : 105,448.62 = 42,876.28 : x
2. Step 2: Convert to fraction form
   76,411/105,448.62 = 42,876.28/x
3. Step 3: Cross multiply
   76,411x = 105,448.62 × 42,876.28
4. Step 4: Simplify right side
   76,411x = 4,521,244,556.73
5. Step 5: Solve for x
   x = 4,521,244,556.73/76,411
6. Step 6: Final answer
   x = 59,170.07