Finding the Fourth Proportional to 78,111.34, 117,172.47 and 31,364.23

Step by Step Solution

1. Step 1: Write the proportion equation
   78,111.34 : 117,172.47 = 31,364.23 : x
2. Step 2: Convert to fraction form
   78,111.34/117,172.47 = 31,364.23/x
3. Step 3: Cross multiply
   78,111.34x = 117,172.47 × 31,364.23
4. Step 4: Simplify right side
   78,111.34x = 3,675,024,298.75
5. Step 5: Solve for x
   x = 3,675,024,298.75/78,111.34
6. Step 6: Final answer
   x = 47,048.54