Finding the Fourth Proportional to 42,455,498.54, 63,682,897.86 and 12,163,390.70

Step by Step Solution

1. Step 1: Write the proportion equation
   42,455,498.54 : 63,682,897.86 = 12,163,390.70 : x
2. Step 2: Convert to fraction form
   42,455,498.54/63,682,897.86 = 12,163,390.70/x
3. Step 3: Cross multiply
   42,455,498.54x = 63,682,897.86 × 12,163,390.70
4. Step 4: Simplify right side
   42,455,498.54x = 774,599,967,579,373.88
5. Step 5: Solve for x
   x = 774,599,967,579,373.88/42,455,498.54
6. Step 6: Final answer
   x = 18,244,985.79