Finding the Fourth Proportional to 31,075.14, 42,899.58 and 21,056.52

Step by Step Solution

1. Step 1: Write the proportion equation
   31,075.14 : 42,899.58 = 21,056.52 : x
2. Step 2: Convert to fraction form
   31,075.14/42,899.58 = 21,056.52/x
3. Step 3: Cross multiply
   31,075.14x = 42,899.58 × 21,056.52
4. Step 4: Simplify right side
   31,075.14x = 903,315,864.26
5. Step 5: Solve for x
   x = 903,315,864.26/31,075.14
6. Step 6: Final answer
   x = 29,068.76