Finding the Fourth Proportional to 42,772,978.35, 64,163,239.29 and 12,067,826.40

Step by Step Solution

1. Step 1: Write the proportion equation
   42,772,978.35 : 64,163,239.29 = 12,067,826.40 : x
2. Step 2: Convert to fraction form
   42,772,978.35/64,163,239.29 = 12,067,826.40/x
3. Step 3: Cross multiply
   42,772,978.35x = 64,163,239.29 × 12,067,826.40
4. Step 4: Simplify right side
   42,772,978.35x = 774,310,833,013,379.25
5. Step 5: Solve for x
   x = 774,310,833,013,379.25/42,772,978.35
6. Step 6: Final answer
   x = 18,102,803.75