Finding the Fourth Proportional to 78,739.02, 108,663.26 and 42,931.08

Step by Step Solution

1. Step 1: Write the proportion equation
   78,739.02 : 108,663.26 = 42,931.08 : x
2. Step 2: Convert to fraction form
   78,739.02/108,663.26 = 42,931.08/x
3. Step 3: Cross multiply
   78,739.02x = 108,663.26 × 42,931.08
4. Step 4: Simplify right side
   78,739.02x = 4,665,030,893.47
5. Step 5: Solve for x
   x = 4,665,030,893.47/78,739.02
6. Step 6: Final answer
   x = 59,246.75