Finding the Fourth Proportional to 102,390.24, 141,308.88 and 57,075.60

Step by Step Solution

1. Step 1: Write the proportion equation
   102,390.24 : 141,308.88 = 57,075.60 : x
2. Step 2: Convert to fraction form
   102,390.24/141,308.88 = 57,075.60/x
3. Step 3: Cross multiply
   102,390.24x = 141,308.88 × 57,075.60
4. Step 4: Simplify right side
   102,390.24x = 8,065,289,111.33
5. Step 5: Solve for x
   x = 8,065,289,111.33/102,390.24
6. Step 6: Final answer
   x = 78,770.10