Finding the Fourth Proportional to 42,146,745.30, 63,221,867.55 and 13,392,069.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42,146,745.30 : 63,221,867.55 = 13,392,069.30 : x
2. Step 2: Convert to fraction form
   42,146,745.30/63,221,867.55 = 13,392,069.30/x
3. Step 3: Cross multiply
   42,146,745.30x = 63,221,867.55 × 13,392,069.30
4. Step 4: Simplify right side
   42,146,745.30x = 846,671,631,505,021.25
5. Step 5: Solve for x
   x = 846,671,631,505,021.25/42,146,745.30
6. Step 6: Final answer
   x = 20,088,659.88