Finding the Fourth Proportional to 64,864,083.89, 89,609,661.86 and 42,589,915.36

Step by Step Solution

1. Step 1: Write the proportion equation
   64,864,083.89 : 89,609,661.86 = 42,589,915.36 : x
2. Step 2: Convert to fraction form
   64,864,083.89/89,609,661.86 = 42,589,915.36/x
3. Step 3: Cross multiply
   64,864,083.89x = 89,609,661.86 × 42,589,915.36
4. Step 4: Simplify right side
   64,864,083.89x = 3,816,467,913,618,647
5. Step 5: Solve for x
   x = 3,816,467,913,618,647/64,864,083.89
6. Step 6: Final answer
   x = 58,837,922.08