Finding the Fourth Proportional to 21,139,949.90, 31,695,928.05 and 7,675,028.30

Step by Step Solution

1. Step 1: Write the proportion equation
   21,139,949.90 : 31,695,928.05 = 7,675,028.30 : x
2. Step 2: Convert to fraction form
   21,139,949.90/31,695,928.05 = 7,675,028.30/x
3. Step 3: Cross multiply
   21,139,949.90x = 31,695,928.05 × 7,675,028.30
4. Step 4: Simplify right side
   21,139,949.90x = 243,267,144,778,513.81
5. Step 5: Solve for x
   x = 243,267,144,778,513.81/21,139,949.90
6. Step 6: Final answer
   x = 11,507,460.80