Finding the Fourth Proportional to 71,978.68, 107,980.78 and 34,606.50

Step by Step Solution

1. Step 1: Write the proportion equation
   71,978.68 : 107,980.78 = 34,606.50 : x
2. Step 2: Convert to fraction form
   71,978.68/107,980.78 = 34,606.50/x
3. Step 3: Cross multiply
   71,978.68x = 107,980.78 × 34,606.50
4. Step 4: Simplify right side
   71,978.68x = 3,736,836,863.07
5. Step 5: Solve for x
   x = 3,736,836,863.07/71,978.68
6. Step 6: Final answer
   x = 51,915.88