Finding the Fourth Proportional to 39,887.47, 55,045.98 and 21,983.13

Step by Step Solution

1. Step 1: Write the proportion equation
   39,887.47 : 55,045.98 = 21,983.13 : x
2. Step 2: Convert to fraction form
   39,887.47/55,045.98 = 21,983.13/x
3. Step 3: Cross multiply
   39,887.47x = 55,045.98 × 21,983.13
4. Step 4: Simplify right side
   39,887.47x = 1,210,082,934.32
5. Step 5: Solve for x
   x = 1,210,082,934.32/39,887.47
6. Step 6: Final answer
   x = 30,337.42