Finding the Fourth Proportional to 56,839.32, 78,438.78 and 34,179

Step by Step Solution

1. Step 1: Write the proportion equation
   56,839.32 : 78,438.78 = 34,179 : x
2. Step 2: Convert to fraction form
   56,839.32/78,438.78 = 34,179/x
3. Step 3: Cross multiply
   56,839.32x = 78,438.78 × 34,179
4. Step 4: Simplify right side
   56,839.32x = 2,680,959,061.62
5. Step 5: Solve for x
   x = 2,680,959,061.62/56,839.32
6. Step 6: Final answer
   x = 47,167.33