Finding the Fourth Proportional to 78,796.74, 108,742.24 and 42,988.72

Step by Step Solution

1. Step 1: Write the proportion equation
   78,796.74 : 108,742.24 = 42,988.72 : x
2. Step 2: Convert to fraction form
   78,796.74/108,742.24 = 42,988.72/x
3. Step 3: Cross multiply
   78,796.74x = 108,742.24 × 42,988.72
4. Step 4: Simplify right side
   78,796.74x = 4,674,689,707.53
5. Step 5: Solve for x
   x = 4,674,689,707.53/78,796.74
6. Step 6: Final answer
   x = 59,325.93