Finding the Fourth Proportional to 76,543.47, 105,621.71 and 42,553.41

Step by Step Solution

1. Step 1: Write the proportion equation
   76,543.47 : 105,621.71 = 42,553.41 : x
2. Step 2: Convert to fraction form
   76,543.47/105,621.71 = 42,553.41/x
3. Step 3: Cross multiply
   76,543.47x = 105,621.71 × 42,553.41
4. Step 4: Simplify right side
   76,543.47x = 4,494,563,930.53
5. Step 5: Solve for x
   x = 4,494,563,930.53/76,543.47
6. Step 6: Final answer
   x = 58,719.10