Finding the Fourth Proportional to 60,300.91, 90,465.14 and 20,857.98

Step by Step Solution

1. Step 1: Write the proportion equation
   60,300.91 : 90,465.14 = 20,857.98 : x
2. Step 2: Convert to fraction form
   60,300.91/90,465.14 = 20,857.98/x
3. Step 3: Cross multiply
   60,300.91x = 90,465.14 × 20,857.98
4. Step 4: Simplify right side
   60,300.91x = 1,886,920,080.82
5. Step 5: Solve for x
   x = 1,886,920,080.82/60,300.91
6. Step 6: Final answer
   x = 31,291.73