Finding the Fourth Proportional to 76,700.52, 105,846.42 and 42,709.40

Step by Step Solution

1. Step 1: Write the proportion equation
   76,700.52 : 105,846.42 = 42,709.40 : x
2. Step 2: Convert to fraction form
   76,700.52/105,846.42 = 42,709.40/x
3. Step 3: Cross multiply
   76,700.52x = 105,846.42 × 42,709.40
4. Step 4: Simplify right side
   76,700.52x = 4,520,637,295.77
5. Step 5: Solve for x
   x = 4,520,637,295.77/76,700.52
6. Step 6: Final answer
   x = 58,938.81