Finding the Fourth Proportional to 76,664.76, 105,796.54 and 42,672.70

Step by Step Solution

1. Step 1: Write the proportion equation
   76,664.76 : 105,796.54 = 42,672.70 : x
2. Step 2: Convert to fraction form
   76,664.76/105,796.54 = 42,672.70/x
3. Step 3: Cross multiply
   76,664.76x = 105,796.54 × 42,672.70
4. Step 4: Simplify right side
   76,664.76x = 4,514,624,012.46
5. Step 5: Solve for x
   x = 4,514,624,012.46/76,664.76
6. Step 6: Final answer
   x = 58,887.86