Finding the Fourth Proportional to 31,547.88, 43,447.49 and 30,858.98

Step by Step Solution

1. Step 1: Write the proportion equation
   31,547.88 : 43,447.49 = 30,858.98 : x
2. Step 2: Convert to fraction form
   31,547.88/43,447.49 = 30,858.98/x
3. Step 3: Cross multiply
   31,547.88x = 43,447.49 × 30,858.98
4. Step 4: Simplify right side
   31,547.88x = 1,340,744,969.15
5. Step 5: Solve for x
   x = 1,340,744,969.15/31,547.88
6. Step 6: Final answer
   x = 42,498.73