Finding the Fourth Proportional to 75,300.10, 112,820.55 and 48,991.30

Step by Step Solution

1. Step 1: Write the proportion equation
   75,300.10 : 112,820.55 = 48,991.30 : x
2. Step 2: Convert to fraction form
   75,300.10/112,820.55 = 48,991.30/x
3. Step 3: Cross multiply
   75,300.10x = 112,820.55 × 48,991.30
4. Step 4: Simplify right side
   75,300.10x = 5,527,225,411.22
5. Step 5: Solve for x
   x = 5,527,225,411.22/75,300.10
6. Step 6: Final answer
   x = 73,402.63