Finding the Fourth Proportional to 63,309.60, 87,402.24 and 42,120

Step by Step Solution

1. Step 1: Write the proportion equation
   63,309.60 : 87,402.24 = 42,120 : x
2. Step 2: Convert to fraction form
   63,309.60/87,402.24 = 42,120/x
3. Step 3: Cross multiply
   63,309.60x = 87,402.24 × 42,120
4. Step 4: Simplify right side
   63,309.60x = 3,681,382,348.80
5. Step 5: Solve for x
   x = 3,681,382,348.80/63,309.60
6. Step 6: Final answer
   x = 58,148.88