Finding the Fourth Proportional to 31,158.42, 42,998.40 and 17,011.32

Step by Step Solution

1. Step 1: Write the proportion equation
   31,158.42 : 42,998.40 = 17,011.32 : x
2. Step 2: Convert to fraction form
   31,158.42/42,998.40 = 17,011.32/x
3. Step 3: Cross multiply
   31,158.42x = 42,998.40 × 17,011.32
4. Step 4: Simplify right side
   31,158.42x = 731,459,541.89
5. Step 5: Solve for x
   x = 731,459,541.89/31,158.42
6. Step 6: Final answer
   x = 23,475.50