Finding the Fourth Proportional to 31,075.59, 42,887.31 and 19,145.91

Step by Step Solution

1. Step 1: Write the proportion equation
   31,075.59 : 42,887.31 = 19,145.91 : x
2. Step 2: Convert to fraction form
   31,075.59/42,887.31 = 19,145.91/x
3. Step 3: Cross multiply
   31,075.59x = 42,887.31 × 19,145.91
4. Step 4: Simplify right side
   31,075.59x = 821,116,577.40
5. Step 5: Solve for x
   x = 821,116,577.40/31,075.59
6. Step 6: Final answer
   x = 26,423.20