Finding the Fourth Proportional to 13,888.01, 19,164.96 and 7,921.59

Step by Step Solution

1. Step 1: Write the proportion equation
   13,888.01 : 19,164.96 = 7,921.59 : x
2. Step 2: Convert to fraction form
   13,888.01/19,164.96 = 7,921.59/x
3. Step 3: Cross multiply
   13,888.01x = 19,164.96 × 7,921.59
4. Step 4: Simplify right side
   13,888.01x = 151,816,955.49
5. Step 5: Solve for x
   x = 151,816,955.49/13,888.01
6. Step 6: Final answer
   x = 10,931.52