Finding the Fourth Proportional to 78,756.30, 108,681.72 and 42,947

Step by Step Solution

1. Step 1: Write the proportion equation
   78,756.30 : 108,681.72 = 42,947 : x
2. Step 2: Convert to fraction form
   78,756.30/108,681.72 = 42,947/x
3. Step 3: Cross multiply
   78,756.30x = 108,681.72 × 42,947
4. Step 4: Simplify right side
   78,756.30x = 4,667,553,828.84
5. Step 5: Solve for x
   x = 4,667,553,828.84/78,756.30
6. Step 6: Final answer
   x = 59,265.78