Finding the Fourth Proportional to 65,577.48, 90,595.62 and 42,970.20

Step by Step Solution

1. Step 1: Write the proportion equation
   65,577.48 : 90,595.62 = 42,970.20 : x
2. Step 2: Convert to fraction form
   65,577.48/90,595.62 = 42,970.20/x
3. Step 3: Cross multiply
   65,577.48x = 90,595.62 × 42,970.20
4. Step 4: Simplify right side
   65,577.48x = 3,892,911,910.52
5. Step 5: Solve for x
   x = 3,892,911,910.52/65,577.48
6. Step 6: Final answer
   x = 59,363.55