Finding the Fourth Proportional to 39,872,081.50, 55,023,494.61 and 21,537,367.18

Step by Step Solution

1. Step 1: Write the proportion equation
   39,872,081.50 : 55,023,494.61 = 21,537,367.18 : x
2. Step 2: Convert to fraction form
   39,872,081.50/55,023,494.61 = 21,537,367.18/x
3. Step 3: Cross multiply
   39,872,081.50x = 55,023,494.61 × 21,537,367.18
4. Step 4: Simplify right side
   39,872,081.50x = 1,185,061,206,942,320.75
5. Step 5: Solve for x
   x = 1,185,061,206,942,320.75/39,872,081.50
6. Step 6: Final answer
   x = 29,721,578.67