Finding the Fourth Proportional to 78,348.29, 108,120.63 and 42,538.31

Step by Step Solution

1. Step 1: Write the proportion equation
   78,348.29 : 108,120.63 = 42,538.31 : x
2. Step 2: Convert to fraction form
   78,348.29/108,120.63 = 42,538.31/x
3. Step 3: Cross multiply
   78,348.29x = 108,120.63 × 42,538.31
4. Step 4: Simplify right side
   78,348.29x = 4,599,268,495.25
5. Step 5: Solve for x
   x = 4,599,268,495.25/78,348.29
6. Step 6: Final answer
   x = 58,702.86