Finding the Fourth Proportional to 78,225.48, 107,951.28 and 42,415.32

Step by Step Solution

1. Step 1: Write the proportion equation
   78,225.48 : 107,951.28 = 42,415.32 : x
2. Step 2: Convert to fraction form
   78,225.48/107,951.28 = 42,415.32/x
3. Step 3: Cross multiply
   78,225.48x = 107,951.28 × 42,415.32
4. Step 4: Simplify right side
   78,225.48x = 4,578,788,085.61
5. Step 5: Solve for x
   x = 4,578,788,085.61/78,225.48
6. Step 6: Final answer
   x = 58,533.21