Finding the Fourth Proportional to 78,030.65, 107,681.54 and 42,219.88

Step by Step Solution

1. Step 1: Write the proportion equation
   78,030.65 : 107,681.54 = 42,219.88 : x
2. Step 2: Convert to fraction form
   78,030.65/107,681.54 = 42,219.88/x
3. Step 3: Cross multiply
   78,030.65x = 107,681.54 × 42,219.88
4. Step 4: Simplify right side
   78,030.65x = 4,546,301,216.71
5. Step 5: Solve for x
   x = 4,546,301,216.71/78,030.65
6. Step 6: Final answer
   x = 58,263.02