Finding the Fourth Proportional to 52,688.68, 72,781.38 and 42,153.64

Step by Step Solution

1. Step 1: Write the proportion equation
   52,688.68 : 72,781.38 = 42,153.64 : x
2. Step 2: Convert to fraction form
   52,688.68/72,781.38 = 42,153.64/x
3. Step 3: Cross multiply
   52,688.68x = 72,781.38 × 42,153.64
4. Step 4: Simplify right side
   52,688.68x = 3,068,000,091.22
5. Step 5: Solve for x
   x = 3,068,000,091.22/52,688.68
6. Step 6: Final answer
   x = 58,228.83