Finding the Fourth Proportional to 78,187.91, 107,899.49 and 42,377.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,187.91 : 107,899.49 = 42,377.87 : x
2. Step 2: Convert to fraction form
   78,187.91/107,899.49 = 42,377.87/x
3. Step 3: Cross multiply
   78,187.91x = 107,899.49 × 42,377.87
4. Step 4: Simplify right side
   78,187.91x = 4,572,550,935.98
5. Step 5: Solve for x
   x = 4,572,550,935.98/78,187.91
6. Step 6: Final answer
   x = 58,481.56