Finding the Fourth Proportional to 71,062.77, 106,531.41 and 28,978.05

Step by Step Solution

1. Step 1: Write the proportion equation
   71,062.77 : 106,531.41 = 28,978.05 : x
2. Step 2: Convert to fraction form
   71,062.77/106,531.41 = 28,978.05/x
3. Step 3: Cross multiply
   71,062.77x = 106,531.41 × 28,978.05
4. Step 4: Simplify right side
   71,062.77x = 3,087,072,525.55
5. Step 5: Solve for x
   x = 3,087,072,525.55/71,062.77
6. Step 6: Final answer
   x = 43,441.49