Finding the Fourth Proportional to 34,978.01, 48,011.39 and 31,116.60

Step by Step Solution

1. Step 1: Write the proportion equation
   34,978.01 : 48,011.39 = 31,116.60 : x
2. Step 2: Convert to fraction form
   34,978.01/48,011.39 = 31,116.60/x
3. Step 3: Cross multiply
   34,978.01x = 48,011.39 × 31,116.60
4. Step 4: Simplify right side
   34,978.01x = 1,493,951,179.18
5. Step 5: Solve for x
   x = 1,493,951,179.18/34,978.01
6. Step 6: Final answer
   x = 42,711.16