Finding the Fourth Proportional to 78,456.47, 117,672.30 and 34,071.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,456.47 : 117,672.30 = 34,071.31 : x
2. Step 2: Convert to fraction form
   78,456.47/117,672.30 = 34,071.31/x
3. Step 3: Cross multiply
   78,456.47x = 117,672.30 × 34,071.31
4. Step 4: Simplify right side
   78,456.47x = 4,009,249,411.71
5. Step 5: Solve for x
   x = 4,009,249,411.71/78,456.47
6. Step 6: Final answer
   x = 51,101.58