Finding the Fourth Proportional to 39,056.53, 53,897.72 and 21,151.12

Step by Step Solution

1. Step 1: Write the proportion equation
   39,056.53 : 53,897.72 = 21,151.12 : x
2. Step 2: Convert to fraction form
   39,056.53/53,897.72 = 21,151.12/x
3. Step 3: Cross multiply
   39,056.53x = 53,897.72 × 21,151.12
4. Step 4: Simplify right side
   39,056.53x = 1,139,997,061.58
5. Step 5: Solve for x
   x = 1,139,997,061.58/39,056.53
6. Step 6: Final answer
   x = 29,188.39