Finding the Fourth Proportional to 76,672.02, 105,812.37 and 42,680.10

Step by Step Solution

1. Step 1: Write the proportion equation
   76,672.02 : 105,812.37 = 42,680.10 : x
2. Step 2: Convert to fraction form
   76,672.02/105,812.37 = 42,680.10/x
3. Step 3: Cross multiply
   76,672.02x = 105,812.37 × 42,680.10
4. Step 4: Simplify right side
   76,672.02x = 4,516,082,532.84
5. Step 5: Solve for x
   x = 4,516,082,532.84/76,672.02
6. Step 6: Final answer
   x = 58,901.31