Finding the Fourth Proportional to 31,145.00, 42,981.10 and 17,715.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,145.00 : 42,981.10 = 17,715.91 : x
2. Step 2: Convert to fraction form
   31,145.00/42,981.10 = 17,715.91/x
3. Step 3: Cross multiply
   31,145.00x = 42,981.10 × 17,715.91
4. Step 4: Simplify right side
   31,145.00x = 761,448,995.82
5. Step 5: Solve for x
   x = 761,448,995.82/31,145.00
6. Step 6: Final answer
   x = 24,448.52