Finding the Fourth Proportional to 20,684,468.18, 28,542,453.72 and 12,735,748.34

Step by Step Solution

1. Step 1: Write the proportion equation
   20,684,468.18 : 28,542,453.72 = 12,735,748.34 : x
2. Step 2: Convert to fraction form
   20,684,468.18/28,542,453.72 = 12,735,748.34/x
3. Step 3: Cross multiply
   20,684,468.18x = 28,542,453.72 × 12,735,748.34
4. Step 4: Simplify right side
   20,684,468.18x = 363,509,507,584,016.81
5. Step 5: Solve for x
   x = 363,509,507,584,016.81/20,684,468.18
6. Step 6: Final answer
   x = 17,574,032.09