Finding the Fourth Proportional to 20,855,085.48, 28,774,614.42 and 12,588,614.28

Step by Step Solution

1. Step 1: Write the proportion equation
   20,855,085.48 : 28,774,614.42 = 12,588,614.28 : x
2. Step 2: Convert to fraction form
   20,855,085.48/28,774,614.42 = 12,588,614.28/x
3. Step 3: Cross multiply
   20,855,085.48x = 28,774,614.42 × 12,588,614.28
4. Step 4: Simplify right side
   20,855,085.48x = 362,232,521,989,105.94
5. Step 5: Solve for x
   x = 362,232,521,989,105.94/20,855,085.48
6. Step 6: Final answer
   x = 17,369,026.00