Finding the Fourth Proportional to 761,320.50, 1,050,656.72 and 421,788.75

Step by Step Solution

1. Step 1: Write the proportion equation
   761,320.50 : 1,050,656.72 = 421,788.75 : x
2. Step 2: Convert to fraction form
   761,320.50/1,050,656.72 = 421,788.75/x
3. Step 3: Cross multiply
   761,320.50x = 1,050,656.72 × 421,788.75
4. Step 4: Simplify right side
   761,320.50x = 443,155,182,498.96
5. Step 5: Solve for x
   x = 443,155,182,498.96/761,320.50
6. Step 6: Final answer
   x = 582,087.55