Finding the Fourth Proportional to 78,798.62, 108,741.07 and 42,987.87

Step by Step Solution

1. Step 1: Write the proportion equation
   78,798.62 : 108,741.07 = 42,987.87 : x
2. Step 2: Convert to fraction form
   78,798.62/108,741.07 = 42,987.87/x
3. Step 3: Cross multiply
   78,798.62x = 108,741.07 × 42,987.87
4. Step 4: Simplify right side
   78,798.62x = 4,674,546,980.82
5. Step 5: Solve for x
   x = 4,674,546,980.82/78,798.62
6. Step 6: Final answer
   x = 59,322.70