Finding the Fourth Proportional to 76,674.64, 105,810.20 and 42,682.60

Step by Step Solution

1. Step 1: Write the proportion equation
   76,674.64 : 105,810.20 = 42,682.60 : x
2. Step 2: Convert to fraction form
   76,674.64/105,810.20 = 42,682.60/x
3. Step 3: Cross multiply
   76,674.64x = 105,810.20 × 42,682.60
4. Step 4: Simplify right side
   76,674.64x = 4,516,254,442.52
5. Step 5: Solve for x
   x = 4,516,254,442.52/76,674.64
6. Step 6: Final answer
   x = 58,901.54