Finding the Fourth Proportional to 18,972,300.56, 28,459,238.22 and 5,509,128.56

Step by Step Solution

1. Step 1: Write the proportion equation
   18,972,300.56 : 28,459,238.22 = 5,509,128.56 : x
2. Step 2: Convert to fraction form
   18,972,300.56/28,459,238.22 = 5,509,128.56/x
3. Step 3: Cross multiply
   18,972,300.56x = 28,459,238.22 × 5,509,128.56
4. Step 4: Simplify right side
   18,972,300.56x = 156,785,602,073,645.53
5. Step 5: Solve for x
   x = 156,785,602,073,645.53/18,972,300.56
6. Step 6: Final answer
   x = 8,263,921.48