Finding the Fourth Proportional to 76,662.31, 105,793.18 and 42,670.26

Step by Step Solution

1. Step 1: Write the proportion equation
   76,662.31 : 105,793.18 = 42,670.26 : x
2. Step 2: Convert to fraction form
   76,662.31/105,793.18 = 42,670.26/x
3. Step 3: Cross multiply
   76,662.31x = 105,793.18 × 42,670.26
4. Step 4: Simplify right side
   76,662.31x = 4,514,222,339.02
5. Step 5: Solve for x
   x = 4,514,222,339.02/76,662.31
6. Step 6: Final answer
   x = 58,884.51