Finding the Fourth Proportional to 78,130.51, 107,820.52 and 42,320.61

Step by Step Solution

1. Step 1: Write the proportion equation
   78,130.51 : 107,820.52 = 42,320.61 : x
2. Step 2: Convert to fraction form
   78,130.51/107,820.52 = 42,320.61/x
3. Step 3: Cross multiply
   78,130.51x = 107,820.52 × 42,320.61
4. Step 4: Simplify right side
   78,130.51x = 4,563,030,071.12
5. Step 5: Solve for x
   x = 4,563,030,071.12/78,130.51
6. Step 6: Final answer
   x = 58,402.67