Finding the Fourth Proportional to 140,070.72, 193,294.38 and 76,410.78

Step by Step Solution

1. Step 1: Write the proportion equation
   140,070.72 : 193,294.38 = 76,410.78 : x
2. Step 2: Convert to fraction form
   140,070.72/193,294.38 = 76,410.78/x
3. Step 3: Cross multiply
   140,070.72x = 193,294.38 × 76,410.78
4. Step 4: Simplify right side
   140,070.72x = 14,769,774,345.42
5. Step 5: Solve for x
   x = 14,769,774,345.42/140,070.72
6. Step 6: Final answer
   x = 105,445.12