Finding the Fourth Proportional to 73,972.98, 102,075.39 and 42,139.98

Step by Step Solution

1. Step 1: Write the proportion equation
   73,972.98 : 102,075.39 = 42,139.98 : x
2. Step 2: Convert to fraction form
   73,972.98/102,075.39 = 42,139.98/x
3. Step 3: Cross multiply
   73,972.98x = 102,075.39 × 42,139.98
4. Step 4: Simplify right side
   73,972.98x = 4,301,454,893.09
5. Step 5: Solve for x
   x = 4,301,454,893.09/73,972.98
6. Step 6: Final answer
   x = 58,149.00