Finding the Fourth Proportional to 42,087.71, 63,131.57 and 28,075.10

Step by Step Solution

1. Step 1: Write the proportion equation
   42,087.71 : 63,131.57 = 28,075.10 : x
2. Step 2: Convert to fraction form
   42,087.71/63,131.57 = 28,075.10/x
3. Step 3: Cross multiply
   42,087.71x = 63,131.57 × 28,075.10
4. Step 4: Simplify right side
   42,087.71x = 1,772,425,000.53
5. Step 5: Solve for x
   x = 1,772,425,000.53/42,087.71
6. Step 6: Final answer
   x = 42,112.66