Finding the Fourth Proportional to 76,726.34, 105,885.20 and 42,272.47

Step by Step Solution

1. Step 1: Write the proportion equation
   76,726.34 : 105,885.20 = 42,272.47 : x
2. Step 2: Convert to fraction form
   76,726.34/105,885.20 = 42,272.47/x
3. Step 3: Cross multiply
   76,726.34x = 105,885.20 × 42,272.47
4. Step 4: Simplify right side
   76,726.34x = 4,476,028,781.41
5. Step 5: Solve for x
   x = 4,476,028,781.41/76,726.34
6. Step 6: Final answer
   x = 58,337.58