Finding the Fourth Proportional to 78,888.71, 118,238.93 and 45,538.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,888.71 : 118,238.93 = 45,538.31 : x
2. Step 2: Convert to fraction form
   78,888.71/118,238.93 = 45,538.31/x
3. Step 3: Cross multiply
   78,888.71x = 118,238.93 × 45,538.31
4. Step 4: Simplify right side
   78,888.71x = 5,384,400,229.52
5. Step 5: Solve for x
   x = 5,384,400,229.52/78,888.71
6. Step 6: Final answer
   x = 68,253.12