Finding the Fourth Proportional to 76,180.63, 105,146.76 and 50,688.06

Step by Step Solution

1. Step 1: Write the proportion equation
   76,180.63 : 105,146.76 = 50,688.06 : x
2. Step 2: Convert to fraction form
   76,180.63/105,146.76 = 50,688.06/x
3. Step 3: Cross multiply
   76,180.63x = 105,146.76 × 50,688.06
4. Step 4: Simplify right side
   76,180.63x = 5,329,685,673.99
5. Step 5: Solve for x
   x = 5,329,685,673.99/76,180.63
6. Step 6: Final answer
   x = 69,961.17