Finding the Fourth Proportional to 78,109,525.98, 117,155,297.97 and 31,421,255.58

Step by Step Solution

1. Step 1: Write the proportion equation
   78,109,525.98 : 117,155,297.97 = 31,421,255.58 : x
2. Step 2: Convert to fraction form
   78,109,525.98/117,155,297.97 = 31,421,255.58/x
3. Step 3: Cross multiply
   78,109,525.98x = 117,155,297.97 × 31,421,255.58
4. Step 4: Simplify right side
   78,109,525.98x = 3,681,166,560,066,425
5. Step 5: Solve for x
   x = 3,681,166,560,066,425/78,109,525.98
6. Step 6: Final answer
   x = 47,128,266.54