Finding the Fourth Proportional to 21,685,002.31, 29,925,024.18 and 12,392,465.81

Step by Step Solution

1. Step 1: Write the proportion equation
   21,685,002.31 : 29,925,024.18 = 12,392,465.81 : x
2. Step 2: Convert to fraction form
   21,685,002.31/29,925,024.18 = 12,392,465.81/x
3. Step 3: Cross multiply
   21,685,002.31x = 29,925,024.18 × 12,392,465.81
4. Step 4: Simplify right side
   21,685,002.31x = 370,844,838,864,448.12
5. Step 5: Solve for x
   x = 370,844,838,864,448.12/21,685,002.31
6. Step 6: Final answer
   x = 17,101,443.37