Finding the Fourth Proportional to 78,795.74, 108,740.86 and 42,987.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,795.74 : 108,740.86 = 42,987.72 : x
2. Step 2: Convert to fraction form
   78,795.74/108,740.86 = 42,987.72/x
3. Step 3: Cross multiply
   78,795.74x = 108,740.86 × 42,987.72
4. Step 4: Simplify right side
   78,795.74x = 4,674,521,642.24
5. Step 5: Solve for x
   x = 4,674,521,642.24/78,795.74
6. Step 6: Final answer
   x = 59,324.55