Finding the Fourth Proportional to 78,390.99, 108,180.37 and 42,581.70

Step by Step Solution

1. Step 1: Write the proportion equation
   78,390.99 : 108,180.37 = 42,581.70 : x
2. Step 2: Convert to fraction form
   78,390.99/108,180.37 = 42,581.70/x
3. Step 3: Cross multiply
   78,390.99x = 108,180.37 × 42,581.70
4. Step 4: Simplify right side
   78,390.99x = 4,606,503,848.32
5. Step 5: Solve for x
   x = 4,606,503,848.32/78,390.99
6. Step 6: Final answer
   x = 58,763.18