Finding the Fourth Proportional to 87,018.72, 120,088.80 and 48,779.88

Step by Step Solution

1. Step 1: Write the proportion equation
   87,018.72 : 120,088.80 = 48,779.88 : x
2. Step 2: Convert to fraction form
   87,018.72/120,088.80 = 48,779.88/x
3. Step 3: Cross multiply
   87,018.72x = 120,088.80 × 48,779.88
4. Step 4: Simplify right side
   87,018.72x = 5,857,917,253.34
5. Step 5: Solve for x
   x = 5,857,917,253.34/87,018.72
6. Step 6: Final answer
   x = 67,317.90