Finding the Fourth Proportional to 76,667.31, 105,800.89 and 42,675.07

Step by Step Solution

1. Step 1: Write the proportion equation
   76,667.31 : 105,800.89 = 42,675.07 : x
2. Step 2: Convert to fraction form
   76,667.31/105,800.89 = 42,675.07/x
3. Step 3: Cross multiply
   76,667.31x = 105,800.89 × 42,675.07
4. Step 4: Simplify right side
   76,667.31x = 4,515,060,386.81
5. Step 5: Solve for x
   x = 4,515,060,386.81/76,667.31
6. Step 6: Final answer
   x = 58,891.60