Finding the Fourth Proportional to 42,521,215.34, 58,697,415.32 and 28,590,645.12

Step by Step Solution

1. Step 1: Write the proportion equation
   42,521,215.34 : 58,697,415.32 = 28,590,645.12 : x
2. Step 2: Convert to fraction form
   42,521,215.34/58,697,415.32 = 28,590,645.12/x
3. Step 3: Cross multiply
   42,521,215.34x = 58,697,415.32 × 28,590,645.12
4. Step 4: Simplify right side
   42,521,215.34x = 1,678,196,970,732,418
5. Step 5: Solve for x
   x = 1,678,196,970,732,418/42,521,215.34
6. Step 6: Final answer
   x = 39,467,286.09