Finding the Fourth Proportional to 87,030, 130,526.70 and 42,612

Step by Step Solution

1. Step 1: Write the proportion equation
   87,030 : 130,526.70 = 42,612 : x
2. Step 2: Convert to fraction form
   87,030/130,526.70 = 42,612/x
3. Step 3: Cross multiply
   87,030x = 130,526.70 × 42,612
4. Step 4: Simplify right side
   87,030x = 5,562,003,740.40
5. Step 5: Solve for x
   x = 5,562,003,740.40/87,030
6. Step 6: Final answer
   x = 63,909.04