Finding the Fourth Proportional to 21,323,456.90, 29,423,841.71 and 12,030,485.20

Step by Step Solution

1. Step 1: Write the proportion equation
   21,323,456.90 : 29,423,841.71 = 12,030,485.20 : x
2. Step 2: Convert to fraction form
   21,323,456.90/29,423,841.71 = 12,030,485.20/x
3. Step 3: Cross multiply
   21,323,456.90x = 29,423,841.71 × 12,030,485.20
4. Step 4: Simplify right side
   21,323,456.90x = 353,983,092,168,354.94
5. Step 5: Solve for x
   x = 353,983,092,168,354.94/21,323,456.90
6. Step 6: Final answer
   x = 16,600,642.85