Finding the Fourth Proportional to 76,514.25, 105,587.53 and 42,521.86

Step by Step Solution

1. Step 1: Write the proportion equation
   76,514.25 : 105,587.53 = 42,521.86 : x
2. Step 2: Convert to fraction form
   76,514.25/105,587.53 = 42,521.86/x
3. Step 3: Cross multiply
   76,514.25x = 105,587.53 × 42,521.86
4. Step 4: Simplify right side
   76,514.25x = 4,489,778,168.41
5. Step 5: Solve for x
   x = 4,489,778,168.41/76,514.25
6. Step 6: Final answer
   x = 58,678.98