Finding the Fourth Proportional to 76,588.20, 105,680.70 and 42,594.93

Step by Step Solution

1. Step 1: Write the proportion equation
   76,588.20 : 105,680.70 = 42,594.93 : x
2. Step 2: Convert to fraction form
   76,588.20/105,680.70 = 42,594.93/x
3. Step 3: Cross multiply
   76,588.20x = 105,680.70 × 42,594.93
4. Step 4: Simplify right side
   76,588.20x = 4,501,462,018.85
5. Step 5: Solve for x
   x = 4,501,462,018.85/76,588.20
6. Step 6: Final answer
   x = 58,774.88