Finding the Fourth Proportional to 100,761.31, 151,142.51 and 30,640.42

Step by Step Solution

1. Step 1: Write the proportion equation
   100,761.31 : 151,142.51 = 30,640.42 : x
2. Step 2: Convert to fraction form
   100,761.31/151,142.51 = 30,640.42/x
3. Step 3: Cross multiply
   100,761.31x = 151,142.51 × 30,640.42
4. Step 4: Simplify right side
   100,761.31x = 4,631,069,986.25
5. Step 5: Solve for x
   x = 4,631,069,986.25/100,761.31
6. Step 6: Final answer
   x = 45,960.80