Finding the Fourth Proportional to 76,641.30, 105,763.32 and 42,648.48

Step by Step Solution

1. Step 1: Write the proportion equation
   76,641.30 : 105,763.32 = 42,648.48 : x
2. Step 2: Convert to fraction form
   76,641.30/105,763.32 = 42,648.48/x
3. Step 3: Cross multiply
   76,641.30x = 105,763.32 × 42,648.48
4. Step 4: Simplify right side
   76,641.30x = 4,510,644,837.75
5. Step 5: Solve for x
   x = 4,510,644,837.75/76,641.30
6. Step 6: Final answer
   x = 58,853.97