Finding the Fourth Proportional to 18,153,111.20, 25,478,128.60 and 18,153,111.20

Step by Step Solution

1. Step 1: Write the proportion equation
   18,153,111.20 : 25,478,128.60 = 18,153,111.20 : x
2. Step 2: Convert to fraction form
   18,153,111.20/25,478,128.60 = 18,153,111.20/x
3. Step 3: Cross multiply
   18,153,111.20x = 25,478,128.60 × 18,153,111.20
4. Step 4: Simplify right side
   18,153,111.20x = 462,507,301,643,700.31
5. Step 5: Solve for x
   x = 462,507,301,643,700.31/18,153,111.20
6. Step 6: Final answer
   x = 25,478,128.60