Finding the Fourth Proportional to 76,663.59, 105,795.77 and 42,671.35

Step by Step Solution

1. Step 1: Write the proportion equation
   76,663.59 : 105,795.77 = 42,671.35 : x
2. Step 2: Convert to fraction form
   76,663.59/105,795.77 = 42,671.35/x
3. Step 3: Cross multiply
   76,663.59x = 105,795.77 × 42,671.35
4. Step 4: Simplify right side
   76,663.59x = 4,514,448,397.85
5. Step 5: Solve for x
   x = 4,514,448,397.85/76,663.59
6. Step 6: Final answer
   x = 58,886.47