Finding the Fourth Proportional to 31,043,940, 42,858,394.56 and 20,604,113.76

Step by Step Solution

1. Step 1: Write the proportion equation
   31,043,940 : 42,858,394.56 = 20,604,113.76 : x
2. Step 2: Convert to fraction form
   31,043,940/42,858,394.56 = 20,604,113.76/x
3. Step 3: Cross multiply
   31,043,940x = 42,858,394.56 × 20,604,113.76
4. Step 4: Simplify right side
   31,043,940x = 883,059,237,085,205.25
5. Step 5: Solve for x
   x = 883,059,237,085,205.25/31,043,940
6. Step 6: Final answer
   x = 28,445,462.69