Finding the Fourth Proportional to 112,978.06, 169,366.41 and 42,906.58

Step by Step Solution

1. Step 1: Write the proportion equation
   112,978.06 : 169,366.41 = 42,906.58 : x
2. Step 2: Convert to fraction form
   112,978.06/169,366.41 = 42,906.58/x
3. Step 3: Cross multiply
   112,978.06x = 169,366.41 × 42,906.58
4. Step 4: Simplify right side
   112,978.06x = 7,266,932,996.56
5. Step 5: Solve for x
   x = 7,266,932,996.56/112,978.06
6. Step 6: Final answer
   x = 64,321.63