Finding the Fourth Proportional to 78,186.22, 107,897.15 and 42,376.21

Step by Step Solution

1. Step 1: Write the proportion equation
   78,186.22 : 107,897.15 = 42,376.21 : x
2. Step 2: Convert to fraction form
   78,186.22/107,897.15 = 42,376.21/x
3. Step 3: Cross multiply
   78,186.22x = 107,897.15 × 42,376.21
4. Step 4: Simplify right side
   78,186.22x = 4,572,272,123.00
5. Step 5: Solve for x
   x = 4,572,272,123.00/78,186.22
6. Step 6: Final answer
   x = 58,479.26