Finding the Fourth Proportional to 31,209.60, 43,066.16 and 17,780.06

Step by Step Solution

1. Step 1: Write the proportion equation
   31,209.60 : 43,066.16 = 17,780.06 : x
2. Step 2: Convert to fraction form
   31,209.60/43,066.16 = 17,780.06/x
3. Step 3: Cross multiply
   31,209.60x = 43,066.16 × 17,780.06
4. Step 4: Simplify right side
   31,209.60x = 765,718,908.77
5. Step 5: Solve for x
   x = 765,718,908.77/31,209.60
6. Step 6: Final answer
   x = 24,534.72