Finding the Fourth Proportional to 485,196.89, 727,695.09 and 130,126.50

Step by Step Solution

1. Step 1: Write the proportion equation
   485,196.89 : 727,695.09 = 130,126.50 : x
2. Step 2: Convert to fraction form
   485,196.89/727,695.09 = 130,126.50/x
3. Step 3: Cross multiply
   485,196.89x = 727,695.09 × 130,126.50
4. Step 4: Simplify right side
   485,196.89x = 94,692,415,128.89
5. Step 5: Solve for x
   x = 94,692,415,128.89/485,196.89
6. Step 6: Final answer
   x = 195,162.87