Finding the Fourth Proportional to 65,510.18, 90,376.04 and 42,809.77

Step by Step Solution

1. Step 1: Write the proportion equation
   65,510.18 : 90,376.04 = 42,809.77 : x
2. Step 2: Convert to fraction form
   65,510.18/90,376.04 = 42,809.77/x
3. Step 3: Cross multiply
   65,510.18x = 90,376.04 × 42,809.77
4. Step 4: Simplify right side
   65,510.18x = 3,868,977,271.86
5. Step 5: Solve for x
   x = 3,868,977,271.86/65,510.18
6. Step 6: Final answer
   x = 59,059.18