Finding the Fourth Proportional to 78,155.08, 107,853.79 and 42,345.16

Step by Step Solution

1. Step 1: Write the proportion equation
   78,155.08 : 107,853.79 = 42,345.16 : x
2. Step 2: Convert to fraction form
   78,155.08/107,853.79 = 42,345.16/x
3. Step 3: Cross multiply
   78,155.08x = 107,853.79 × 42,345.16
4. Step 4: Simplify right side
   78,155.08x = 4,567,085,994.16
5. Step 5: Solve for x
   x = 4,567,085,994.16/78,155.08
6. Step 6: Final answer
   x = 58,436.20