Finding the Fourth Proportional to 78,741.16, 108,663.32 and 42,931.77

Step by Step Solution

1. Step 1: Write the proportion equation
   78,741.16 : 108,663.32 = 42,931.77 : x
2. Step 2: Convert to fraction form
   78,741.16/108,663.32 = 42,931.77/x
3. Step 3: Cross multiply
   78,741.16x = 108,663.32 × 42,931.77
4. Step 4: Simplify right side
   78,741.16x = 4,665,108,972.75
5. Step 5: Solve for x
   x = 4,665,108,972.75/78,741.16
6. Step 6: Final answer
   x = 59,246.13