Finding the Fourth Proportional to 78,799.62, 108,742.45 and 42,988.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,799.62 : 108,742.45 = 42,988.87 : x
2. Step 2: Convert to fraction form
   78,799.62/108,742.45 = 42,988.87/x
3. Step 3: Cross multiply
   78,799.62x = 108,742.45 × 42,988.87
4. Step 4: Simplify right side
   78,799.62x = 4,674,715,046.53
5. Step 5: Solve for x
   x = 4,674,715,046.53/78,799.62
6. Step 6: Final answer
   x = 59,324.08