Finding the Fourth Proportional to 21,046,402.88, 28,833,089.45 and 20,259,535.23

Step by Step Solution

1. Step 1: Write the proportion equation
   21,046,402.88 : 28,833,089.45 = 20,259,535.23 : x
2. Step 2: Convert to fraction form
   21,046,402.88/28,833,089.45 = 20,259,535.23/x
3. Step 3: Cross multiply
   21,046,402.88x = 28,833,089.45 × 20,259,535.23
4. Step 4: Simplify right side
   21,046,402.88x = 584,144,991,502,016.38
5. Step 5: Solve for x
   x = 584,144,991,502,016.38/21,046,402.88
6. Step 6: Final answer
   x = 27,755,098.81