Finding the Fourth Proportional to 76,377.30, 105,397.89 and 42,387.27

Step by Step Solution

1. Step 1: Write the proportion equation
   76,377.30 : 105,397.89 = 42,387.27 : x
2. Step 2: Convert to fraction form
   76,377.30/105,397.89 = 42,387.27/x
3. Step 3: Cross multiply
   76,377.30x = 105,397.89 × 42,387.27
4. Step 4: Simplify right side
   76,377.30x = 4,467,528,820.86
5. Step 5: Solve for x
   x = 4,467,528,820.86/76,377.30
6. Step 6: Final answer
   x = 58,492.89