Finding the Fourth Proportional to 12,345,623.21, 18,518,436.86 and 5,153,233.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,345,623.21 : 18,518,436.86 = 5,153,233.61 : x
2. Step 2: Convert to fraction form
   12,345,623.21/18,518,436.86 = 5,153,233.61/x
3. Step 3: Cross multiply
   12,345,623.21x = 18,518,436.86 × 5,153,233.61
4. Step 4: Simplify right side
   12,345,623.21x = 95,429,831,113,256.52
5. Step 5: Solve for x
   x = 95,429,831,113,256.52/12,345,623.21
6. Step 6: Final answer
   x = 7,729,851.26