Finding the Fourth Proportional to 78,100.94, 107,779.31 and 42,290.94

Step by Step Solution

1. Step 1: Write the proportion equation
   78,100.94 : 107,779.31 = 42,290.94 : x
2. Step 2: Convert to fraction form
   78,100.94/107,779.31 = 42,290.94/x
3. Step 3: Cross multiply
   78,100.94x = 107,779.31 × 42,290.94
4. Step 4: Simplify right side
   78,100.94x = 4,558,088,683.76
5. Step 5: Solve for x
   x = 4,558,088,683.76/78,100.94
6. Step 6: Final answer
   x = 58,361.51