Finding the Fourth Proportional to 31,094.72, 42,900 and 21,659.84

Step by Step Solution

1. Step 1: Write the proportion equation
   31,094.72 : 42,900 = 21,659.84 : x
2. Step 2: Convert to fraction form
   31,094.72/42,900 = 21,659.84/x
3. Step 3: Cross multiply
   31,094.72x = 42,900 × 21,659.84
4. Step 4: Simplify right side
   31,094.72x = 929,207,136
5. Step 5: Solve for x
   x = 929,207,136/31,094.72
6. Step 6: Final answer
   x = 29,883.12