Finding the Fourth Proportional to 12,290,427.15, 17,174,711.55 and 12,290,427.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,290,427.15 : 17,174,711.55 = 12,290,427.15 : x
2. Step 2: Convert to fraction form
   12,290,427.15/17,174,711.55 = 12,290,427.15/x
3. Step 3: Cross multiply
   12,290,427.15x = 17,174,711.55 × 12,290,427.15
4. Step 4: Simplify right side
   12,290,427.15x = 211,084,541,127,538.59
5. Step 5: Solve for x
   x = 211,084,541,127,538.59/12,290,427.15
6. Step 6: Final answer
   x = 17,174,711.55