Finding the Fourth Proportional to 57,473,323.30, 86,233,604.55 and 21,099,139.30

Step by Step Solution

1. Step 1: Write the proportion equation
   57,473,323.30 : 86,233,604.55 = 21,099,139.30 : x
2. Step 2: Convert to fraction form
   57,473,323.30/86,233,604.55 = 21,099,139.30/x
3. Step 3: Cross multiply
   57,473,323.30x = 86,233,604.55 × 21,099,139.30
4. Step 4: Simplify right side
   57,473,323.30x = 1,819,454,834,741,563.75
5. Step 5: Solve for x
   x = 1,819,454,834,741,563.75/57,473,323.30
6. Step 6: Final answer
   x = 31,657,379.99