Finding the Fourth Proportional to 42,064.30, 63,082.79 and 13,976.81

Step by Step Solution

1. Step 1: Write the proportion equation
   42,064.30 : 63,082.79 = 13,976.81 : x
2. Step 2: Convert to fraction form
   42,064.30/63,082.79 = 13,976.81/x
3. Step 3: Cross multiply
   42,064.30x = 63,082.79 × 13,976.81
4. Step 4: Simplify right side
   42,064.30x = 881,696,362.75
5. Step 5: Solve for x
   x = 881,696,362.75/42,064.30
6. Step 6: Final answer
   x = 20,960.68