Finding the Fourth Proportional to 76,664.71, 105,797.29 and 42,672.47

Step by Step Solution

1. Step 1: Write the proportion equation
   76,664.71 : 105,797.29 = 42,672.47 : x
2. Step 2: Convert to fraction form
   76,664.71/105,797.29 = 42,672.47/x
3. Step 3: Cross multiply
   76,664.71x = 105,797.29 × 42,672.47
4. Step 4: Simplify right side
   76,664.71x = 4,514,631,047.94
5. Step 5: Solve for x
   x = 4,514,631,047.94/76,664.71
6. Step 6: Final answer
   x = 58,887.99