Finding the Fourth Proportional to 12,571,940.88, 17,349,399.72 and 7,139,471.76

Step by Step Solution

1. Step 1: Write the proportion equation
   12,571,940.88 : 17,349,399.72 = 7,139,471.76 : x
2. Step 2: Convert to fraction form
   12,571,940.88/17,349,399.72 = 7,139,471.76/x
3. Step 3: Cross multiply
   12,571,940.88x = 17,349,399.72 × 7,139,471.76
4. Step 4: Simplify right side
   12,571,940.88x = 123,865,549,353,891.89
5. Step 5: Solve for x
   x = 123,865,549,353,891.89/12,571,940.88
6. Step 6: Final answer
   x = 9,852,539.92