Finding the Fourth Proportional to 86,784.84, 130,126.68 and 42,366.60

Step by Step Solution

1. Step 1: Write the proportion equation
   86,784.84 : 130,126.68 = 42,366.60 : x
2. Step 2: Convert to fraction form
   86,784.84/130,126.68 = 42,366.60/x
3. Step 3: Cross multiply
   86,784.84x = 130,126.68 × 42,366.60
4. Step 4: Simplify right side
   86,784.84x = 5,513,025,000.89
5. Step 5: Solve for x
   x = 5,513,025,000.89/86,784.84
6. Step 6: Final answer
   x = 63,525.21