Finding the Fourth Proportional to 78,509.25, 117,802.83 and 31,123.35

Step by Step Solution

1. Step 1: Write the proportion equation
   78,509.25 : 117,802.83 = 31,123.35 : x
2. Step 2: Convert to fraction form
   78,509.25/117,802.83 = 31,123.35/x
3. Step 3: Cross multiply
   78,509.25x = 117,802.83 × 31,123.35
4. Step 4: Simplify right side
   78,509.25x = 3,666,418,709.08
5. Step 5: Solve for x
   x = 3,666,418,709.08/78,509.25
6. Step 6: Final answer
   x = 46,700.47