Finding the Fourth Proportional to 78,613.74, 108,488.90 and 42,805.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,613.74 : 108,488.90 = 42,805.72 : x
2. Step 2: Convert to fraction form
   78,613.74/108,488.90 = 42,805.72/x
3. Step 3: Cross multiply
   78,613.74x = 108,488.90 × 42,805.72
4. Step 4: Simplify right side
   78,613.74x = 4,643,945,476.51
5. Step 5: Solve for x
   x = 4,643,945,476.51/78,613.74
6. Step 6: Final answer
   x = 59,072.95