Finding the Fourth Proportional to 21,150,719.68, 31,726,189.00 and 9,628,128.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,150,719.68 : 31,726,189.00 = 9,628,128.72 : x
2. Step 2: Convert to fraction form
   21,150,719.68/31,726,189.00 = 9,628,128.72/x
3. Step 3: Cross multiply
   21,150,719.68x = 31,726,189.00 × 9,628,128.72
4. Step 4: Simplify right side
   21,150,719.68x = 305,463,831,444,925.06
5. Step 5: Solve for x
   x = 305,463,831,444,925.06/21,150,719.68
6. Step 6: Final answer
   x = 14,442,242.92