Finding the Fourth Proportional to 78,111.56, 107,793.38 and 42,300.74

Step by Step Solution

1. Step 1: Write the proportion equation
   78,111.56 : 107,793.38 = 42,300.74 : x
2. Step 2: Convert to fraction form
   78,111.56/107,793.38 = 42,300.74/x
3. Step 3: Cross multiply
   78,111.56x = 107,793.38 × 42,300.74
4. Step 4: Simplify right side
   78,111.56x = 4,559,738,990.63
5. Step 5: Solve for x
   x = 4,559,738,990.63/78,111.56
6. Step 6: Final answer
   x = 58,374.71