Finding the Fourth Proportional to 106,978.23, 147,634.56 and 59,231.57

Step by Step Solution

1. Step 1: Write the proportion equation
   106,978.23 : 147,634.56 = 59,231.57 : x
2. Step 2: Convert to fraction form
   106,978.23/147,634.56 = 59,231.57/x
3. Step 3: Cross multiply
   106,978.23x = 147,634.56 × 59,231.57
4. Step 4: Simplify right side
   106,978.23x = 8,744,626,775.06
5. Step 5: Solve for x
   x = 8,744,626,775.06/106,978.23
6. Step 6: Final answer
   x = 81,742.12