Finding the Fourth Proportional to 31,075.72, 42,887.59 and 18,975.53

Step by Step Solution

1. Step 1: Write the proportion equation
   31,075.72 : 42,887.59 = 18,975.53 : x
2. Step 2: Convert to fraction form
   31,075.72/42,887.59 = 18,975.53/x
3. Step 3: Cross multiply
   31,075.72x = 42,887.59 × 18,975.53
4. Step 4: Simplify right side
   31,075.72x = 813,814,810.45
5. Step 5: Solve for x
   x = 813,814,810.45/31,075.72
6. Step 6: Final answer
   x = 26,188.13