Finding the Fourth Proportional to 78,001.38, 107,641.98 and 42,191.28

Step by Step Solution

1. Step 1: Write the proportion equation
   78,001.38 : 107,641.98 = 42,191.28 : x
2. Step 2: Convert to fraction form
   78,001.38/107,641.98 = 42,191.28/x
3. Step 3: Cross multiply
   78,001.38x = 107,641.98 × 42,191.28
4. Step 4: Simplify right side
   78,001.38x = 4,541,552,917.93
5. Step 5: Solve for x
   x = 4,541,552,917.93/78,001.38
6. Step 6: Final answer
   x = 58,224.01