Finding the Fourth Proportional to 23,415, 32,312.70 and 12,804.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,415 : 32,312.70 = 12,804.72 : x
2. Step 2: Convert to fraction form
   23,415/32,312.70 = 12,804.72/x
3. Step 3: Cross multiply
   23,415x = 32,312.70 × 12,804.72
4. Step 4: Simplify right side
   23,415x = 413,755,075.94
5. Step 5: Solve for x
   x = 413,755,075.94/23,415
6. Step 6: Final answer
   x = 17,670.51