Finding the Fourth Proportional to 64,834,142.86, 97,258,025.25 and 21,118,308.07

Step by Step Solution

1. Step 1: Write the proportion equation
   64,834,142.86 : 97,258,025.25 = 21,118,308.07 : x
2. Step 2: Convert to fraction form
   64,834,142.86/97,258,025.25 = 21,118,308.07/x
3. Step 3: Cross multiply
   64,834,142.86x = 97,258,025.25 × 21,118,308.07
4. Step 4: Simplify right side
   64,834,142.86x = 2,053,924,939,509,338.75
5. Step 5: Solve for x
   x = 2,053,924,939,509,338.75/64,834,142.86
6. Step 6: Final answer
   x = 31,679,680.63