Finding the Fourth Proportional to 201,442.56, 302,170.56 and 61,200.72

Step by Step Solution

1. Step 1: Write the proportion equation
   201,442.56 : 302,170.56 = 61,200.72 : x
2. Step 2: Convert to fraction form
   201,442.56/302,170.56 = 61,200.72/x
3. Step 3: Cross multiply
   201,442.56x = 302,170.56 × 61,200.72
4. Step 4: Simplify right side
   201,442.56x = 18,493,055,834.80
5. Step 5: Solve for x
   x = 18,493,055,834.80/201,442.56
6. Step 6: Final answer
   x = 91,803.12