Finding the Fourth Proportional to 78,201.30, 107,918.35 and 42,391.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,201.30 : 107,918.35 = 42,391.88 : x
2. Step 2: Convert to fraction form
   78,201.30/107,918.35 = 42,391.88/x
3. Step 3: Cross multiply
   78,201.30x = 107,918.35 × 42,391.88
4. Step 4: Simplify right side
   78,201.30x = 4,574,861,097.43
5. Step 5: Solve for x
   x = 4,574,861,097.43/78,201.30
6. Step 6: Final answer
   x = 58,501.09