Finding the Fourth Proportional to 905,920,779.39, 1,250,024,835.27 and 509,420,128.83

Step by Step Solution

1. Step 1: Write the proportion equation
   905,920,779.39 : 1,250,024,835.27 = 509,420,128.83 : x
2. Step 2: Convert to fraction form
   905,920,779.39/1,250,024,835.27 = 509,420,128.83/x
3. Step 3: Cross multiply
   905,920,779.39x = 1,250,024,835.27 × 509,420,128.83
4. Step 4: Simplify right side
   905,920,779.39x = 636,787,812,621,191,040
5. Step 5: Solve for x
   x = 636,787,812,621,191,040/905,920,779.39
6. Step 6: Final answer
   x = 702,917,768.43