Finding the Fourth Proportional to 13,235,632.72, 19,792,499.31 and 12,589,931.90

Step by Step Solution

1. Step 1: Write the proportion equation
   13,235,632.72 : 19,792,499.31 = 12,589,931.90 : x
2. Step 2: Convert to fraction form
   13,235,632.72/19,792,499.31 = 12,589,931.90/x
3. Step 3: Cross multiply
   13,235,632.72x = 19,792,499.31 × 12,589,931.90
4. Step 4: Simplify right side
   13,235,632.72x = 249,186,218,493,178.22
5. Step 5: Solve for x
   x = 249,186,218,493,178.22/13,235,632.72
6. Step 6: Final answer
   x = 18,826,921.52