Finding the Fourth Proportional to 78,186.72, 107,897.16 and 42,376.68

Step by Step Solution

1. Step 1: Write the proportion equation
   78,186.72 : 107,897.16 = 42,376.68 : x
2. Step 2: Convert to fraction form
   78,186.72/107,897.16 = 42,376.68/x
3. Step 3: Cross multiply
   78,186.72x = 107,897.16 × 42,376.68
4. Step 4: Simplify right side
   78,186.72x = 4,572,323,422.23
5. Step 5: Solve for x
   x = 4,572,323,422.23/78,186.72
6. Step 6: Final answer
   x = 58,479.54