Finding the Fourth Proportional to 78,111.76, 117,085 and 25,507.12

Step by Step Solution

1. Step 1: Write the proportion equation
   78,111.76 : 117,085 = 25,507.12 : x
2. Step 2: Convert to fraction form
   78,111.76/117,085 = 25,507.12/x
3. Step 3: Cross multiply
   78,111.76x = 117,085 × 25,507.12
4. Step 4: Simplify right side
   78,111.76x = 2,986,501,145.20
5. Step 5: Solve for x
   x = 2,986,501,145.20/78,111.76
6. Step 6: Final answer
   x = 38,233.69