Finding the Fourth Proportional to 31,066.21, 42,875.60 and 18,323.00

Step by Step Solution

1. Step 1: Write the proportion equation
   31,066.21 : 42,875.60 = 18,323.00 : x
2. Step 2: Convert to fraction form
   31,066.21/42,875.60 = 18,323.00/x
3. Step 3: Cross multiply
   31,066.21x = 42,875.60 × 18,323.00
4. Step 4: Simplify right side
   31,066.21x = 785,609,312.81
5. Step 5: Solve for x
   x = 785,609,312.81/31,066.21
6. Step 6: Final answer
   x = 25,288.23