Finding the Fourth Proportional to 86,748.38, 130,123.48 and 30,578.02

Step by Step Solution

1. Step 1: Write the proportion equation
   86,748.38 : 130,123.48 = 30,578.02 : x
2. Step 2: Convert to fraction form
   86,748.38/130,123.48 = 30,578.02/x
3. Step 3: Cross multiply
   86,748.38x = 130,123.48 × 30,578.02
4. Step 4: Simplify right side
   86,748.38x = 3,978,918,373.91
5. Step 5: Solve for x
   x = 3,978,918,373.91/86,748.38
6. Step 6: Final answer
   x = 45,867.35