Finding the Fourth Proportional to 57,864.17, 86,774.59 and 19,902.71

Step by Step Solution

1. Step 1: Write the proportion equation
   57,864.17 : 86,774.59 = 19,902.71 : x
2. Step 2: Convert to fraction form
   57,864.17/86,774.59 = 19,902.71/x
3. Step 3: Cross multiply
   57,864.17x = 86,774.59 × 19,902.71
4. Step 4: Simplify right side
   57,864.17x = 1,727,049,741.95
5. Step 5: Solve for x
   x = 1,727,049,741.95/57,864.17
6. Step 6: Final answer
   x = 29,846.62