Finding the Fourth Proportional to 67,488.40, 101,315.80 and 42,528.40

Step by Step Solution

1. Step 1: Write the proportion equation
   67,488.40 : 101,315.80 = 42,528.40 : x
2. Step 2: Convert to fraction form
   67,488.40/101,315.80 = 42,528.40/x
3. Step 3: Cross multiply
   67,488.40x = 101,315.80 × 42,528.40
4. Step 4: Simplify right side
   67,488.40x = 4,308,798,868.72
5. Step 5: Solve for x
   x = 4,308,798,868.72/67,488.40
6. Step 6: Final answer
   x = 63,845.03